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The IBM Storage Manager version 10.10 has been released with support for disk systems DS4800, DS4700 Express, DS4200 Express and expansion units EXP810, EXP710, EXP100 and EXP420.

Bare in mind that the SM 10.10 upgrade is an offline process. 

The key new features are: 

More partitions and logins

• DS4800 increased to 512 partitions and 2,048 logins
• DS4700 / DS4200 increased to 128 partitions and 512 logins
• Ideal for larger consolidations and server virtualization / blade servers

More mirrors per system

• DS4800 increased to 128
• DS4700 / DS4200 increased to 64
• Ideal for environments looking to replicate/protect more applications/data

More FlashCopy images per logical drives

• DS4800 increased to 16
• DS4700 / DS4200 increased to 8
• Ideal for creating an additional level of data protection and the means to improve the granularity of recovery and production data utilizationMore partitions and logins

Configurable drive replacement

• GHS can become a permanent member of an array or to invoke the copy back command once the failed drive has been replaced
• Ideal for SATA configurations where drive location isn’t important

Full-config RAID 10 and RAID 0 arrays

• Ideal for very large databases or file systems, or those wishing to utilize more than 30 drives per LUN to maximize performance

Great than 2 TB LUNs (OS dependent)

• Ideal for HPC environments and bandwidth-oriented applications that need to move large amounts of data with maximum throughput performance

License key for DS4800 Model 80 to 82 performance boost

RAID 6 on DS4700 Express and DS4200 Express

• Protection against two different failure scenarios:  Functional failure of second drive and Unreadable sector on second drive

Hardware-assisted P+Q yields better performance

• For bandwidth writes and two-drive reconstruction (compared to DP)
• ONLY ~ 2-4% drop-off for MB/s (compared to RAID 5)

Enabled on a per-volume-group basis

Dynamic RAID level migration available

Maximum RAID group same as RAID 5 with no other restrictions

Source:   IBM Support and DS4000 / SM 10.10 Redbook 

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