PowerVault MD3200 Series Competitive Analysis

jazzydoeSoftware and s/w Development

Oct 30, 2013 (3 years and 10 months ago)

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PowerVault

MD3200 Series

Competitive
Analysis



HP P2000 G3

Dell MD3200

Introducing the HP P2000 G3


Multiple interface controller options:


8
Gb

Fibre

Channel (2) Ports per controller or


8
Gb

Fibre

Channel (2) Ports per controller+1
GbE

iSCSI

(2) Ports per
controller or


1
GbE

iSCSI

(4) Ports per controller


6
Gb
/sec SAS (4) Ports per controller or


10
GbE

(2) Ports per controller


The controllers can be housed in either a 2U 25
-
slot enclosure for 2.5
-
in drives or a 2U 12
-
slot enclosure for 3.5
-
in drives.


6Gb/s
SAS 2.0
drives



64 Snapshot and clone is included as default


The
G3 is marketed to offer excellent price/performance and
availability features for direct attach configurations (depending on OS),
clusters, workgroups and entry
-
level SAN environments.


Cluster support: Windows, Linux, HP
-
UX, OpenVMS

P2000 G3 Expansion Options

Both the 2.5” SFF & the 3.5” LFF Controller/Drive Modules can be
expanded by adding expansion enclosures


Either 2.5” SFF drive enclosures (25 drives/enclosure)


Or 3.5” LFF drive enclosures (12 drives/enclosure)


P2000 G3


Configuration Flexibility











149 SFF Drives

148 SFF/LFF Drives

96 LFF Drives

Maximum 149 SFF Drives

Maximum 8 Enclosures

Can intermix SAS/SATA in enclosures

P2000 G3 Family Performance Overview

How does P2000 G3 compare with HP’s MSA2000 G2?


SAS 2.0 Chipsets & Drives




6Gb/s vs. SAS 1.0


3Gb/s in MSA2000 G2


Greater Scalability


Up to 149 drives vs. 99 SFF or 60 LFF drives in MSA2000 G2


More Cache


2GB cache per controller


1GB/controller on G2


SMU management software


Appears to be more solid than in MSA2000 G2


Storage
-
based remote volume mirroring


Not available in MSA2000 G2

Dell MD3200 &
HP P2000 Quick Comparison

Dell MD3200

HP P2000 G3


Affordable entry to midrange storage


Small to mid
-
sized consolidation projects


Affordable entry to midrange storage


Small to mid
-
sized consolidation projects


SAS, 1Gb
iSCSI

or 10Gb
iSCSI


High
-
performance SAN abilities


FC or concurrent FC/iSCSI connectivity


Medium
-
performance
SAN abilities


Low
-
cost, high
-
performance DAS


Low
-
cost,
mid
-
performance

DAS


SAS 2.0 drive robustness with next
-

generation investment protection


SAS 2.0 drive robustness with next
-

generation investment protection


Excellent for VMware environments


Questionable for VMware environments

Feature Comparison

Storage Performance = Storage Efficiency

Notable Differences Between
Dell MD3200 &
P2000 G3

Dell MD3200

HP P2000 G3

Quick, responsive Management software

Fairly sluggish Management software

Same Management used in most of the line

Different Management from the rest of the line

Industry
-
leading high performance RAID 6P+Q

RAID 6 locks up entire system with dual failure

Good performance with Volume Copies

Very slow performance with Volume Copies

Supports any combination of drive enclosures

Restrictive combinations of drive enclosures

Excellent performance for consolidated workloads

Mediocre performance limits consolidation

128 Snapshot (8 per logical drive)

64 Snapshots
-

upgradeable to 512

Total of 96 SFF &/or LFF drives

Total of 96 LFF drives or 149 SFF

HP P2000 G3 Has Limited Drive Flexibility

Start with SFF 24
-
slot

Expand w/ SFF 25
-
slot

Start with SFF 24
-
slot

Expand w/ LFF 12
-
slot

Start with LFF 12
-
slot

Expand w/ SFF 25
-
slot

Start with LFF 12
-
slot

Expand w/ LFF 12
-
slot

AP846A


FC Ports

or

AW568A


FC+iSCSI

Ports

AP846A


FC Ports

or

AW568A


FC+iSCSI
Ports

AP845A


FC Ports

or

AW567A


FC+iSCSI Ports

AP845A


FC Ports

or

AW567A


FC+iSCSI Ports

































149 Drives Total

Unknown

Unknown

96 Drives Total



The G3 suffers from many of the same configuration problems as the MSA2000 G2.



Whichever drive enclosure is chosen (2.5 inch or 3.5 inch), all subsequent expansion modules must be of the same type.



Customers are locked into inflexible configurations that often fail to suit their needs.



Dell has no such restrictions. Different enclosures and drive types can be added as the application warrants.


P2000 G3 Issues


Upgrading MSA 2000G2 to P2000 G3


Note:

Any I/O Module or MSA2000 Expansion Enclosure in the chain after a 3 Gb I/O Module will
only transfer data at 3 Gb to the array controller.


In order for data to be transferred between an array controller and a disk at the 6 Gb rate,
all of
the following items must be capable

of 6 Gb transfer:

1.
The disk

2.
The expansion enclosure containing the disk

3.
All I/O modules in the chain between the disk and the controller

4.
The array controller

From:

Upgrading the HP
StorageWorks

MSA2000 G2 to the P2000 G3 MSA White paper


http://h20195.www2.hp.com/v2/GetPDF.aspx/4AA0
-
8304ENW.pdf

P2000 G3 Issues cont’d


Despite claims of non
-
disruptive activities, disruptive changes are necessary


Controller firmware upgrades are disruptive:


Management software requires application shutdown prior to upgrades.


Numerous configuration issues also require server reboots.


Replacing MSA controllers with P series controllers is a disruptive event requiring downtime.


Dell supports non
-
disruptive firmware updates, additions to RAID groups, Segment size changes, LUN Controller
ownership & much more


Storage Management remains frustratingly sluggish


The Storage Management interface is a bit faster than the previous version but still has notable issues with lag time
on some selections.


The SMU screen re
-
write delays become more pronounced as the controllers are taxed.


Dell has fast, sprite
-
based, management software
-

regardless of the system load.

P2000 G3 Issues cont’d


Customers will discover that many of the features conflict with each other


Must choose either drive spin
-
down or disk scrubbing as they cannot run both simultaneously.


Drive Spin
-
Down has an irritating drawback which slows down system management


When customers wish to create a new
Vdisk

the system makes them wait until it has spun
-
up all unused disks


The reason is the metadata has to be read/written to each drive


This includes all Hot Spares


Management software allows destructive commands to be executed


It is possible to delete a
vdisk
/volume from the SMU console while data is being written to a Windows mounted drive causing the
data transfer to fail critically.


LUNS/Volumes/
Vdisks

have limitations


Each
vdisk

has a 16TB


Maximum of 16 drives can be in a RAID group


Dell can have up to 96 drives in a RAID 0, 96 drives in a RAID 10, 30 drives in RAID 5 or 6

P2000 G3 Issues cont’d


Critical RAID 6 failures


The P2000 G3 does not pass RAID 6 dual drive failures.


During RAID 6 dual drive failure testing, the system completely locked up when the second drive was pulled.


Dell employs ultra
-
fast RAID 6P+Q hardware and has no issues with dual failures


Customers experience numerous configuration issues


IPing

the controllers is tricky & cumbersome using the new USB serial cable and special HP USB software


The MSA Discovery Tool is only useful after the controllers are
IP’d


iSCSI

connections have trouble connecting and are very time
-
consuming to setup.


iSCSI

connections break easily restricting access to
vdisk
/volumes/data.


Dell configuration is easier, less time
-
consuming, and not prone to irksome problems

Dell MD3200 Storage
System


Product Overview


Three interface options


SAS,
iSCSI
, 10Gb (March,2011)


Four or eight 6 Gb/s SAS ports


Eight
1 Gb/s
iSCSI

ports


Up
to 96 drives


high performance and
nearline

SAS, SSD, SED


MD3200
(2U 24 2.5
-
in drives) and
MD3220
(2U 12 3.5
-
in drive) enclosures


2GB cache


Mirrored, battery
-
backed,
de
-
staged
to flash


High Performance Tier(Turbo)
and base performance options


MDSM software
and legacy premium features


SafeStore

encryption, Partitioning
(32),
Snapshot (8/
vol
), Volume Copy,


MD3200 Series


Key Features and Value Propositions

6Gb SAS systems
deliver mid
-
range performance and high availability at entry
-
level prices

Enterprise version of SAS

Green efficiencies reduce energy expenditures

Great performance to power
-

Superior performance efficiency meets requirements with fewer drives

Meets multiple power efficiency standards for reduced power consumption

Low power consumption, heat generation and greater IOPS/Watt with 2.5
-
in drives and SSDs

Extensive suite of Microsoft and VMware solutions

Consolidation, backup/recovery and business
continuity

MD3200 Series


Key Features and Value Propositions (cont’d)


Multi
-
protocol interface support provides consolidation flexibility to increase efficiencies and lower costs


A wide range of host interface options meets a range of workload requirements


6Gb SAS ideal for rack
-
integrated solutions and small
-
scale HPC


Built
-
in efficiencies and flexibility lower costs


Enclosure
-
level drive intermix cost
-
effectively meets all application, rack and energy efficiency requirements within a
single storage system


Support for both 3.5
-
in and 2.5
-
in enclosures supports both high IOPS/Watt and low cost capacity or performance
requirements


Balanced performance for mixed workloads and virtualization


Enhanced data security and protection



Relentless data security for data
-
at
-
rest


Enhanced RAS features ensure reliable protection of data


Self
-
sustained de
-
stage ensures cached data is safe during extended outage


Reliability, Availability, Serviceability



Fully
-
redundant active
-
active

I/O path from host to drives

with automated failover


Proactive drive health monitoring identifies problem
drives before they create issues


Media scan with automated parity correction


Hardware
-
assist RAID 6



Disk encryption(SED) secures data throughout drive’s
lifecycle


Dedicated data cache


Battery backed, mirrored, de
-
staged to disk on power loss


Global Hot Spares


“Unlimited” number, health check, rebuild options


Intuitive administration interface maintains simplicity
without sacrificing configurability

Dell MD3200 Designed
to ensure continuous data access

Efficiency Comparisons

P2000 G3

FC

P2000 G3
10GbE

MD3200

SAS Turbo

P2000 G3

SAS

MD3200

SAS

P2000 G3

iSCSI

MD3200

iSCSI

Random Performance

Random Cache Reads


IOPS

?

?

200,000

?

140,000

?

70,000

Random Disk Reads


IOPS

18,698
1

15,500
1

40,000

19,682
1

30,000

13,493
1

30,000

Random Disk Writes


IOPS

?

?

12,500

?

7,500

?

7,500

Sequential Performance

Sequential Cache Reads


MB/s

?

?

6,000

?

2,500

?

900

Sustained Disk Reads


MB/s

1,572

1,500

4,000

1,572

2,000

274

900

Sustained Disk Writes


MB/s

1,195

775

2,600

1,172

1,100

266

940

1
HP has onl y r e l e ase d thi s 60/40 Re ad/Wr i te numbe r

HP Te sts r un wi th
144

15K SAS Drives


Sour ce
:
“HP
StorageWorks

P2000 G3 Modular Smart Array

Systems”
QuickSpecs

Document,
October 15,
2010


Version
8

MD3200 SAS & SAS Turbo


tested with 96 3.5 inch 15 K SAS drives

100% reads and as 100% writes

MD3200
iSCSI


tested with 96 2.5 inch 10K SAS drives

100% reads and as 100% writes

Efficiency Comparisons

P2000 G3

FC

P2000 G3
10GbE

MD3200

SAS Turbo

P2000 G3

SAS

MD3200

SAS

P2000 G3

iSCSI

MD3200

iSCSI

Random Performance

Random Cache Reads


IOPS

?

?

200,000

?

140,000

?

70,000

Random Disk Reads


IOPS

18,698
1

15,500
1

40,000

19,682
1

30,000

13,493
1

30,000

Random Disk Writes


IOPS

?

?

12,500

?

7,500

?

7,500

Sequential Performance

Sequential Cache Reads


MB/s

?

?

6,000

?

2,500

?

900

Sustained Disk Reads


MB/s

1,572

1,500

4,000

1,572

2,000

274

900

Sustained Disk Writes


MB/s

1,195

775

2,600

1,172

1,100

266

940

1
HP has onl y r e l e ase d thi s 60/40 Re ad/Wr i te numbe r

HP Te sts r un wi th
144

15K SAS Drives


Source
:
“HP
StorageWorks

P2000 G3 Modular Smart Array

Systems”
QuickSpecs

Document,
October 15,
2010


Version
8

Note: HP is indicating that 10GbE delivers 35%
less

write performance than their own FC system.
Considerably less write performance than any MD3200!

P2000 G3 Summary


The HP P2000 G3 MSA is a modest improvement over its predecessor, the MSA 2000 G2. It does little more that upgrade controlle
r m
odules
and fixes in its SMU management SW.


The G3 requires many areas of improvement before it could be considered for robust, mission
-
critical storage system applications

such as
Exchange, Oracle or MS SQL.


The numerous problems, errors, missing features, and reproducible connectivity issues give this device a “version 1.1 update”

fe
el, where all of
the bugs have not yet been worked out and it was rushed into release.


Many features are not “fully implemented” and appear to have been hurried into production without adequate testing


The storage system lacks the robustness and stability that would inspire confidence that the P2000 is a rock solid storage ca
pab
le of
withstanding power outages while delivering exceptional performance and availability.


Contrary to how it has been marketed, this device is best used as a departmental, edge
-
of
-
the
-
network local storage system for t
he cost
conscious customer. It is a very entry
-
level device, which will be purchased by customers looking for low
-
cost expandable storag
e offering
minimum capabilities and basic expandability.


Some customers will accept the shortcomings in exchange for a low
-
cost, dense, small form factor system.


They will count on HP’s warranty and service after the purchase.


The G3 does not have a Turbo option and in many cases only one
-
half the performance of a MD3200

Dell MD3200i

HP P4000

P4500 G2

Virtualization SAN

P4500 G2

Multisite SAN

P4300 G2

Starter SAN

P4000 G2 Family

HP
LeftHand

P4000 SANs

Cost effective storage for virtualization, easy to implement



P4300 G2

MDL SAS Starter
SAN

P4300 G2

SAS Starter

SAN

P4500 G2

Virtualization

SAN

P4500 G2

Multi
-
Site

SAN

P4500 G2


Scalable Capacity
SAN

P4000 G2
Storage Systems

Disk Drives

16, scales to 320

16, scales to 320

24, scales to 480

48, scales to 960

48, scales to 960

Varies

Starting
Capacity

12.0 TB 7.2K
MDL SAS

4.8 TB 15K

SAS

10.8 TB 15K SAS

21.6 TB 15K

SAS

60 TB 7.2K


MDL SAS

Varies

Dual
Active/Active
Controllers











w/ 2 Nodes

Dual
Active/Active
Site Failover



Every SAN/iQ
®

feature included













3 Yrs Basic
Support











1 yr Basic

HP LeftHand
P4000
Replication for
Remote Offices

Optional

Optional







Optional

P4000 G2 Strengths


HP’s claims…


All
-
inclusive pricing and intuitive storage management SW


Pay
-
as
-
you
-
grow


Scale capacity and performance linearly


The SAN for the budget
-
minded


Bundled with multiple SAN/
iQ

software capabilities


Storage Clustering


Network RAID


Thin Provisioning


Snapshots


Remote Copy (
asynch

replication)


Multi
-
Site/DR Solution (synch replication)


Solution Pack for Microsoft Windows


P4000 G2 Specifications

HP P4300 G2
MDL SAS

Starter SAN

HP P4300 G2
SAS

Starter SAN

HP P4500 G2
Virtualization
SAN

HP P4500 G2
MultiSite

SAN

(2 total systems)

Controllers

Dual

Dual

Dual

Dual

Cache

1 GB

1 GB

1 GB

2 GB

RAM

12 GB

8 GB

8GB

16 GB

Host Ports

4
-

1Gb/s IP

4
-

1Gb/s IP

4
-

1Gb/s IP

4
-

1Gb/s IP x2

Max # of Drives

16

16

24

48

Drive Types

MDL SAS

SAS

SAS

SAS

Max Raw Capacity

16.0 TB

7.2 TB

10.8 TB

21.6 TB

SAN Expansion Node


8 TB


3.6 TB SAS

5.4 TB SAS

10.8 TB SAS

Storage RAID level

5, 6, 10

5, 6, 10

5, 6, 10

5, 6, 10

Warranty

3 yr Basic Support

(9x5 NBD)

3 yr Basic Support

(9x5 NBD)

3 yr Basic Support

(9x5 NBD)

3 yr Basic Support

(9x5 NBD)

MSRP

$30,000

$30,000

$52,000

$100,000

Expansion Node

$20,000

$20,000

$28,000

$52,000

P4000 G2 Weaknesses


Capacity

P4000 G2 Consume huge amounts of capacity


Users set “replication” and have the additional option for Network RAID


HP writes
, “you
must

choose a replication level that is at least equal to the number of sites in the configuration”


According to HP document, “User Manuals, Multi Site SAN User Manual for
SANiQ

8.0


2009”



Three sites would contain at least 3 complete copies of user data (as high as 4)



Additionally when using snapshots,


HP writes,
“When considering the size of snapshots in the cluster, remember that
the replication level

of the volume is duplicated
in the snapshot.”


According to HP document, “HP
LeftHand

Storage Solutions user guide


September, 2009”


P4000 G2 Weaknesses


Expansion


HP claims,
“Purchase only what you need today”


HP says,
“grow the performance, capacity, and redundancy of your HP P4000 SAN online as storage requirements evolve. Buying
storage only when needed simplifies planning and relieves budget pressures.”




If a multi
-
site SAN, HP states,
m
obtain feature keys

IRU?WKH?QHZ?VWRUDJH?QRGHVn



HP reminds users to,
m3ODQ?WR?DGG?WKH?VDPH?QXPEHU?RI?VWRUDJH?QRGHV?
to each site
?n


According to HP document, “User Manuals, Multi Site SAN User Manual for
SANiQ

8.0


2009”



Scalability will likely require large expenditures for both storage hardware and feature keys


Users should budget accordingly

P4000 G2 Weaknesses


Expansion


HP claims,
“Purchase only what you need today”


HP says,
“grow the performance, capacity, and redundancy of your HP P4000 SAN online as storage requirements evolve. Buying
storage only when needed simplifies planning and relieves budget pressures.”



HP also suggests care in how users deal with different capacities,


“Clusters can contain storage nodes with different capacities. However, all storage nodes in a cluster
operate at a capacity equal to that of the
smallest capacity storage node
.”


“If you add a storage node with a smaller capacity, the
capacity of the entire cluster will be reduced
.”


“While you can mix storage nodes with different RAID levels in a cluster, note that the capacity limitation applies to the av
ail
able capacity as
determined by RAID, not the raw disk capacity.”


“Changing the order of the storage node list
causes a full cluster restripe
.”


“Moving the volume to a different cluster requires restriping the data in both clusters.
Restriping can take hours, or even days
.”


According to HP document, “HP
LeftHand

Storage Solutions user guide


September, 2009”


MD32xx rebuild only take 1 hour

P4000 G2 Weaknesses


Expansion


HP claims,
“Purchase only what you need today”


HP says,
“grow the performance, capacity, and redundancy of your HP P4000 SAN online as storage requirements evolve. Buying
storage only when needed simplifies planning and relieves budget pressures.”



HP warns about adding storage modules,


“Adding or replacing storage modules
can heavily impact the drives
,


The
cluster now restripes the data

from the existing units to the newly added/replaced units. This process
could take a day or longer
,
depending on the amount of data, and the local bandwidth setting.”


According to HP document, “HP
LeftHand

Storage Solutions Support Procedures, Best Practice for Adding or Replacing Storage Modules in a Production
Cluster


2009”


P4000 G2 Weaknesses


CPU Power

P4000 G2 systems may lack sufficient CPU power


Here is what HP says, “
Disk rebuilds after a recently replaced disk drive can cause high CPU utilization while SAN/
iQ

is busy
resyncing

data.”


“Snapshot maintenance, particularly deletions, can be CPU resource intensive
.”


According to HP document, “Support Procedures, CPU Utilization Alerts”


P4000 G2 Weaknesses


Upgrades

HP Marketing may not be in tune with engineering / support


HP marketing claims non
-
disruptive upgrades


However, under the heading,
“Upgrading the SAN/
iQ

software on the storage node”
the user guides lists…


Prerequisites


“Stop any applications that are accessing volumes that reside on the storage node you are upgrading and log off all related

iSCSI

VHVVLRQVn


According to HP document, “HP
LeftHand

Storage Solutions user guide


September, 2009”



That sounds pretty disruptive to me!



The only performance data we could find came from the document referenced below.


This documents states, “Typical results for 3 DL320s SAS in RAID 5 with 2 way replication”


We recognize the vast difference between “typical” performance and “test” performance


but even allowing for that difference, i
t
appears the P4000 does not deliver great performance.


We welcome better benchmarks.

Efficiency Comparisons

MD3000

MD3000i

3 DL320s

SAS R5

MD3200

SAS

Random Performance

Random Cache Reads



IOPS

92,000

64,000

200,000

Random Disk Reads



IOPS

21,000

20,000

6,000
*

40,000

Random Disk Writes



IOPS

4,500

4,100

12,500

Sequential Performance

Sequential Cache Reads



MB/s

1,450

400

6,000

Sustained Disk Reads


MB/s

900

380

110

6,000

Sustained Disk Writes


MB/s

690

300

34

1,450

*

100% Random (20% Write/80% Read)


P4000 Performance Numbers from:

Application Notes, Best Practices for Enabling Microsoft Windows with
SANiQ

-

2009

Source of Performance Data

Chart found on page 79

Application Notes, Best Practices for Enabling Microsoft Windows with
SANiQ

-

2009

Notable Differences Between MD32x0 & HP P4000 G2

Dell MD32x0

HP P4000 G2

Provides efficient capacity

Consumes huge amounts of capacity

Natively supports SAS 2.0 or
iSCSI

host interfaces

Natively only supports
iSCSI

Flexibility by way of 2.5” and 3.5” disk drives

Only supports 3.5” disk drives (no SSD/SED)

Provides granular disk upgrade options

Expansion requires purchasing feature keys, is
accompanied by long restriping penalties, and
may waste capacity.

Allows intermixing of SAS/NL SAS within enclosure

Requires separate systems for different types of
drives

Hardware XOR for outstanding balanced
performance

Software XOR and meager performance,
especially lacks throughput performance

Excellent entry level value with affordable upgrades

Expensive entry price and expensive upgrades

Competitive Take
-
Aways

vs. HP P4000 G2


MD32x0 provides capacity efficient storage


P4000 G2 consumes huge amounts of raw capacity


MD32x0 provides granular, affordable scaling


P4000 G2 expansion requires purchase of feature keys, long restriping penalties and wasted capacity


MD32x0 provides outstanding value


P4000 G2 has a reasonable expensive entry price and expensive upgrades


MD32x0


best
-
in
-
class balanced performance


P4000 G2 appears to have weak random and especially weak throughput performance


Dell MD32x0 delivers exceptional storage value


Dell MD3200

IBM DS3500


Three Host Interface



SAS

FC/SAS

iSCSI
/SAS


4 or 8

6
Gbps

SAS


8 x

8
Gbps

FC and 4x 6
Gbps

SAS


8 x

1
Gbps

iSCSI

and

4 x

6
Gbps

SAS


Maximinal

96 x

SAS

HDD


10K/15K

SAS

NL
-
SAS and FDE


EXP3512

2U 12 3.5’ HDD

and

EXP3524

2U 24 2.5’ HDD



Optional

Turbo
Lincese



IBM DS Storage Manager


Enterprise manager tool


FC support remote mirror

DS3500 Overview

2.5
-
in

3.5
-
in

IBM DS3500 Series


IBM DS series partition license does not comes with free. Will required license to enable partition. Default 4




IBM offer turbo option same as Dell High Performance Tier option however it was double the cost of acquisition:




Standard Cache Memory for DS3500 is 1GB, optional upgrade for 2GB RAM. Dell comes with 2GB default


IBM do not offer SSD drives, a major drawback for customer who wanted super fast drive.


IBM charge for FDE (Full Disk Encryption), similar to Dell SED. Dell comes with free, only required to purchase SED enable dr
ive


Base

System

Turbo

Adder

IBM

$
8
,
799

$
6
,
850

Dell

$
8
,
740

$
3
,
660

IBM DS3500 Series (
con’t
)


IBM claims they support remote mirroring(only available in FC model). The pre
-
requisite for mirroring: required 8Gb FC 4 Port Da
ughter
Card is required for the
Fibre

Channel communications link. It’s cost $3,198 just for mirroring?


IBM support Three interface options



SAS,
iSCSI
/SAS, FC/SAS Four or eight 6
Gbps

SAS ports


Eight 8
Gbps

FC ports and four 6
Gbps

SAS ports


Eight 1
Gbps

iSCSI

ports and four 6
Gbps

SAS ports


What is the cost of acquisition? Also do SMB customer required combo interface, this will increase complexity


IBM support HP UX and AIX system, Dell don’t. Dell support open platform both of this OS is proprietary OS:





DS3500 default comes with 2 snapshot copies, customer has the choice to upgrade to 4 or 8 and only support 64 per system. Com
par
ing the
cost (even the base more expensive):

Go forth and win!

Thank You

Q

& A