topic Using HP Array Configuration Utility CLI to break a mirror online in Operating System - Linux

Using HP Array Configuration Utility CLI to break a mirror online

Baruch Shpirer — Wed, 02 Jul 2008 10:20:35 GMT

Hi.
This is my configuration:
I got 2 physical drives defined as RAID 1 (ld 1)
i want to break this mirror online to two RAID 0 drives

Can this be done?
Baruch

************************************
=> ctrl slot=0 show config detail

Smart Array 6i in Slot 0
Bus Interface: PCI
Slot: 0
RAID 6 (ADG) Status: Disabled
Controller Status: OK
Chassis Slot:
Hardware Revision: Rev B
Firmware Version: 2.36
Rebuild Priority: Low
Expand Priority: Low
Surface Scan Delay: 15 sec
Cache Board Present: True
Cache Status: OK
Accelerator Ratio: 100% Read / 0% Write
Total Cache Size: 64 MB
Battery Pack Count: 0
SATA NCQ Supported: False

Array: A
Interface Type: Parallel SCSI
Unused Space: 0 MB
Status: Failed

Logical Drive: 1
Size: 67.8 GB
Fault Tolerance: RAID 1+0
Heads: 255
Sectors Per Track: 32
Cylinders: 17433
Stripe Size: 128 KB
Status: Interim Recovery Mode
Array Accelerator: Enabled
Unique Identifier: 600508B1001FFFFFA00004FCAE6F0000
Disk Name: /dev/cciss/c0d0
Mount Points: /boot 127 MB
Logical Drive Label: A00004FCAE6F

physicaldrive 1:0
SCSI Bus: 1
SCSI ID: 0
Status: OK
Drive Type: Data Drive
Interface Type: Parallel SCSI
Transfer Mode: Ultra 320 Wide
Size: 72.8 GB
Transfer Speed: 320 MB/Sec
Rotational Speed: 15000
Firmware Revision: HPB1
Serial Number: DNA1P64051P60616
Model: COMPAQ BF07289BC4
physicaldrive 1:1
SCSI Bus: 1
SCSI ID: 1
Status: Failed
Drive Type: Data Drive
Interface Type: Parallel SCSI
Size: ??? GB

Re: Using HP Array Configuration Utility CLI to break a mirror online

Matti_Kurkela — Wed, 02 Jul 2008 12:03:43 GMT

You have two physical drives (1:0 and 1:1) in your RAID set.

The drive 1:1 has failed and cannot even report its serial number. It may be totally dead.

No command can give you two working RAID 0 disks in this situation: you can only get one RAID 0 disk and one failed disk.

If these two disks were installed at the same time, they are probably from the same manufacturing lot, and probably have very similar wearing properties. One of the two has already failed; the other might be very close to a failure as well.

My recommendation: if possible, replace the failed physicaldrive 1:1 and let the mirror rebuild itself. If you need more disk space, plug in one (or preferably two or three) new disks for added capacity. If you want performance, get an even number of new disks and use RAID 1; if your primary goal is capacity, get at least three disks and use RAID 5.

Use RAID 0 only if you need extreme performance *and* are prepared to totally rebuild the server if one of the disks fail.

MK

Re: Using HP Array Configuration Utility CLI to break a mirror online

Baruch Shpirer — Wed, 02 Jul 2008 12:46:21 GMT

Say i put the drive back
Will i be able to accomplish this?

ctrl slot=o ld 1 modify raid=0

modify/migrate

Didnt work wail disk 1 is out
ill bring it back in and rebuild and retry

anyone done that ever or helped anyone else to do this?

Baruch

Re: Using HP Array Configuration Utility CLI to break a mirror online

Baruch Shpirer — Thu, 03 Jul 2008 07:12:23 GMT

i run

ctrl slot=0 ld 1 modify raid=0

after i returned the other disk
now its RAID 0 but expanding

how can i stop expanding and remove the second
physical drive to create another logical drive?

Re: Using HP Array Configuration Utility CLI to break a mirror online

Baruch Shpirer — Thu, 03 Jul 2008 07:18:23 GMT

can i stop the expand?

Logical Drive: 1
Size: 67.8 GB
Fault Tolerance: RAID 0
Heads: 255
Sectors Per Track: 32
Cylinders: 17433
Stripe Size: 128 KB
Status: Expanding 17.1% complete
Array Accelerator: Enabled
Unique Identifier: 600508B1001FFFFFA00004FCAE6F0000
Disk Name: /dev/cciss/c0d0
Mount Points: /boot 127 MB
Logical Drive Label: A00004FCAE6F