IBM 81Y6843 manual Hard drive options for external expansion enclosures Part

Table 21. Hard drive options for external expansion enclosures (Part 2)

Part number	Description	Maximum quantity supported
		per one enclosure
EXP2524 Hot-Swap SAS 2.5" Hard Drives
49Y1896	146 GB 15K 6 Gb SAS 2.5” HDD	24
49Y1895	300 GB 10K 6 Gb SAS 2.5” HDD	24
81Y9596	600 GB 10K 6 Gb SAS 2.5” HDD	24
49Y1898	500 GB 7,200 RPM 6 Gb SAS NL 2.5” HDD	24
EXP2524 Hot-Swap SAS 2.5" Solid State Drives
81Y9956	200GB 2.5" SAS SSD	24
81Y9960	400GB 2.5" SAS SSD	24

The RAID controllers listed in the following table are supported with external expansion enclosures.

Table 22. RAID controllers for external storage expansion enclosures

Part number	Description	Maximum quantity
		supported
46M0830	ServeRAID M5025 SAS/SATA Controller	4
46M0930	ServeRAID M5000 Series Advance Feature Key†	1 per one M5025
81Y4426	ServeRAID M5000 Series Performance Accelerator Key†	1 per one M5025

† Only one key is supported in each controller, either the Advance Feature Key or the Performance Accelerator Key.

The ServeRAID M5025 SAS/SATA Controller has the following specifications:

Two Mini-SAS external connectors

Supports RAID levels 0, 1, 5, 10, and 50

Supports RAID 6 and 60 with the optional M5000 Advanced Feature Key

Performance optimization for SSD drives with optional M5000 Series Performance Accelerator Key

6 Gbps throughput per port

PCI Express 2.0 x8 host interface

Based on the LSI SAS2108 6 Gbps ROC controller

512 MB of onboard cache

Intelligent Li-Ion-based battery backup unit with up to 48 hours of data retention

Supports connectivity to the EXP3000, EXP2512, and EXP2524 storage expansion enclosures

For more information, see the IBM Redbooks Product Guide ServeRAID M5025 SAS/SATA Controller for IBM System x: http://www.redbooks.ibm.com/abstracts/tips0739.html?Open

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