Jul 102008
 

Choosing the Correct EqualLogic Array

EqualLogic PS5000 ImageAll the new Dell/Equallogic units include 8 or 16 drives, dual power supplies and dual fans. Single controller units have three (3) GbE connections and Dual controller (active/passive) models have six (6) GbE connections. The complete suite of software is included – Snapshots, Replication (for off-site Disaster Recovery), Volume Management, Multi-path I/O capability (for performance), Cloning and more. There are no licenses or keys needed.

The following table shows estimated usable capacity based on one of three RAID types: 10, 50 and 5.

Model Step 3 Drive Type Step 2 Controller(s) RPM Drive Qty Drive Capacity RAID 10 Usable Step 1 RAID 50 Usable RAID 5 Usable
PS5000E 2TB SATA Single 7,200 8 250 GB

749

1251

1503

PS5000E 4TB SATA Single 7,200 16 250 GB

1497

2503

3006

PS5000E 4TB SATA Dual 7,200 16 250 GB

1497

2503

3006

PS5000E 8TB SATA Dual 7,200 16 500 GB

2994

5006

6011

PS5000E 12TB SATA Dual 7,200 16 750 GB

4492

7509

9017

PS5000E 16TB SATA Dual 7,200 16 1 TB

5989

10011

12022

PS5000X 6.4TB SCSI Dual 10,000 16 400 GB

2396

4004

4809

PS5000XV 2.3TB SCSI Dual 15,000 16 146 GB

874

1462

1755

PS5000XV 4.8TB SCSI Dual 15,000 16 300 GB

1797

3003

3607

PS5000XV 7.2TB SCSI Dual 15,000 16 450 GB

3012

5173

6037

PS5500E
PS6500E
24TB
SATA Dual 7,200 48 500 GB

10400

17600

19000

PS5500E
PS6500E
48TB
SATA Dual 7,200 48 1 TB

20800

35200

37900


Selecting a Model

Step 1 - Determine how much usable space you will need. You will decide during the initialization process which RAID configuration you want but we typically recommend using RAID50 as the default. It will give you the highest performance balanced with the most capacity.

eQ-Tip: You can change the RAID type even after initialization BUT, you can only go to a HIGHER capacity RAID type. If you start with RAID50 you can go to RAID5, but not RAID10. If RAID10 will give you plenty of capacity, start with it; you can always change it to RAID50 later.

Step 2 - Decide if you need a single controller or dual-controller model. Dual controllers make the unit fully redundant and is recommended for primary data.

eQ-Tip: Many customers use a dual-controller for their primary site and a single controller unit for their remote (disaster recovery) site. This configuration will save you some money upfront.

Step 3 - Select the type of drives you want; Serial ATA (SATA) or SCSI. The cost per Terabyte is generally lower for the SATA drives because of their higher per drive capacities. If you are unsure then go with the SAS or contact us for a suggestion.

eQ-Tip: Although the rotational speed of the SAS drives are faster, don’t assume SATA will not provide enough performance. EqualLogic boxes are built on a frameless design and that means that all disks will be used for I/O (except spares of course).

Step 4 - Select support level you want from the following list:

Customer Care Plus

  • Hardware onsite replacement within 4 hours
  • Software updates for length of agreement
  • Knowledge base access online 24 hours a day for length of agreement
  • Technical Support Center access 24 hours a day, 1 hour response time peak (9×5), 2 hour off peak for length of agreement

Customer Care

  • Hardware advanced replacement next business day
  • Software updates for length of agreement
  • Knowledge base access online 24 hours a day for length of agreement
  • Technical Support Center access 24 hours a day, 2 hour response time peak (9×5), 4 hour off peak for length of agreement

Standard Warranty

  • Two-year standard warranty period
  • Hardware advanced replacement next best date for first 90 days, return to factory for repair for remainder of warranty period
  • Software updates for one-year
  • Knowledge base access online 24 hours a day for one year
  • Technical Support Center access (9×5), best effort for length of warranty period
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