Asset ID:	1-71-1009344.1
Update Date:	2010-06-08
Keywords:

Solution Type Technical Instruction Sure

Solution 1009344.1 : Sun StorEdge[TM] 9900 series: Explain Striping Group size for RAID 5 (7D+1P), RAID 1 (4D+4D) and RAID 6 (6D+2P) with HDD model 146GB or larger

Related Items


Sun Storage 9970 System
 Sun Storage 9990 System
 Sun Storage 9960 System
 Sun Storage 9985 System
 Sun Storage 9980 System

Related Categories


GCS>Sun Microsystems>Storage - Disk>Datacenter Disk

PreviouslyPublishedAs
212928

Description
Sun StorEdge[TM] 99x0 series: Explain Striping Group size for RAID 5 (7D+1P), RAID 1 (4D+4D) and RAID 6 (6D+2P) with HDD model 146GB or larger

With the introduction of 146GB HDD and larger, for Sun StorEdge[TM] 9970, 9980,9985 and 9990, HDS/Hitachi has implemented Striping Groups to overcome limitations in representing very large Parity Groups in cache.

The maximum capacity of the striping groups must be considered, if using OPEN-V
or LUSE/CVS.

Steps to Follow
A Striping Group is a virtual Parity Group within the real Parity Group.

During configuration, if the platform has any of the following configurations,
a "Striping Group Configuration window" will be displayed:

HDD models of 146GB capacity or larger

   Plus any of the following:

RAID 5 (7D+1P)
RAID 6 (6D+2P)
RAID 1 (4D+4D)

In any other conditions, the Striping Group is equal to the Parity Group, so a
"Striping Group Configuration window" will NOT be displayed.

Sun StorEdge[TM] 9970 and Sun StorEdge[TM] 9980

Please consult following sections of the Maintenance Manual:

INST01-290 Drive Expansion Sequence RAID5 (7D+1P)
INST05-180 Striping Group Configuration window
OPEN03-280 OPEN-V Setting
OPEN03-290 LUSE definition

If selecting OPEN-V or LUSE/CVS, consider the size, based on the above
references. The Striping Groups have different capacities, and combined,
they reflect the capacity of the Parity Group.

For example:

RAID5 (7D+1P) Striping Group (1) = 0.75TB (decimal) = 737256 MB
RAID5 (7D+1P) Striping Group (2) = 0.27TB (decimal) = 222440 MB
RAID5 (7D+1P) Parity Group = 1.02TB (decimal) = 959696 MB

Sun StorEdge[TM] 9990

Please consult following sections of the Maintenance Manual:

INST01-530 Drive Expansion Sequence RAID5 (7D+1P/6D+2P)
INST01-590 Drive Expansion Sequence RAID5 (7D+1P/6D+2P)
INST05-200 Striping Group Configuration window
OPEN03-320 OPEN-V Setting

Sun StorEdge[TM] 9985

Please consult following sections of the Maintenance Manual:

INST05-210 Striping Group Configuration window
OPEN03-320 OPEN-V Setting

Product
Sun StorageTek 9980 System
Sun StorageTek 9970 System
Sun StorageTek 9900V Series Array
Sun StorageTek 9990 System
Sun StorageTek 9985 System
300 GB 10Krpm Hard Disk Drive for Sun StorageTek 9990
Sun StorageTek 9960 System
Sun StorageTek 9910

Internal Comments
The following is strictly for the use of Sun employees:

Additional see HDS Solution ID HDS24973 "Striping Group Configuration (9900V)"

se9979, se9980, se9990, se9985, striping group, parity group, open-v, luse, 146gb, 300gb
Previously Published As
82828

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