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2-12 RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide
Compaq Confidential – Need to Know Required
Writer: Bob Young Project: RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide Comments:
Part Number: EK-SMCPO-UG. C01 File Name: c-ch2 RAID Array Controller.doc Last Saved On: 12/4/00 1:51 PM
RAID Levels Supported
The RAID Array 3000 controller supports the following RAID levels:
Table 2-3
RAID Levels Supported
RAID Level Description
0 Striping without parity
1 Mirroring
0+1 Striping and mirroring
4 Striping with fixed parity drive
5 Striping with floating parity drive
JBOD Just a Bunch of Drives
NOTE: The controller stripes data in multi-block chunk sizes. Also, the controller does not
support RAID level 3 or 0 with a one-block chunk size.
There are some restrictions you must adhere to when creating a RAID set on
the RAID 3000 pedestal. The minimum and maximum number of drives
required to support each RAID level are listed in Table 2–4.
Table 2-4
Pedestal RAID Set Restrictions
RAID Level Min. No.
*
of Drives Max. No.
*
of Drives
JBOD 1 1
0214
1214
0+1 4 14
4314
5314
*
Must be an even number.