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hpacucli controller slot=1 ld 1 show detail

Smart Array P400 in Slot 1

array A

  Logical Drive: 1
     Size: 273.3 GB
     Fault Tolerance: RAID 1+0
     Heads: 255
     Sectors Per Track: 32
     Cylinders: 65535
     Stripe Size: 128 KB
     Status: OK
     Array Accelerator: Enabled
     Unique Identifier: xxxx
     Disk Name: /dev/cciss/c0d0
     Mount Points: /boot 196 MB, / 7.8 GB
     Logical Drive Label: xxxxx
     Mirror Group 0:
        physicaldrive 1I:1:8 (port 1I:box 1:bay 8, SAS, 72 GB, Predictive Failure)
        physicaldrive 1I:1:7 (port 1I:box 1:bay 7, SAS, 72 GB, OK)
        physicaldrive 1I:1:6 (port 1I:box 1:bay 6, SAS, 72 GB, OK)
        physicaldrive 1I:1:5 (port 1I:box 1:bay 5, SAS, 72 GB, OK)
     Mirror Group 1:
        physicaldrive 2I:1:4 (port 2I:box 1:bay 4, SAS, 72 GB, OK)
        physicaldrive 2I:1:3 (port 2I:box 1:bay 3, SAS, 72 GB, OK)
        physicaldrive 2I:1:2 (port 2I:box 1:bay 2, SAS, 72 GB, OK)
        physicaldrive 2I:1:1 (port 2I:box 1:bay 1, SAS, 72 GB, OK)

hpacucli controller slot=1 show

Smart Array P400 in Slot 1 Bus Interface: PCI Slot: 1 Serial Number: xxxx Cache Serial Number: xxxx RAID 6 (ADG) Status: Disabled Controller Status: OK Chassis Slot: Hardware Revision: Rev D Firmware Version: 4.06 Rebuild Priority: Medium Expand Priority: Medium Surface Scan Delay: 15 secs Post Prompt Timeout: 0 secs Cache Board Present: True Cache Status: OK Accelerator Ratio: 100% Read / 0% Write Drive Write Cache: Disabled Total Cache Size: 256 MB Battery Pack Count: 0 SATA NCQ Supported: True

Is it safe to run this sequence of commands?

hpacucli controller slot=1 array A remove drives=1:8

then

hpacucli controller slot=1 pd 1:8 modify led=on

get remote hands to remove the drive and replace.

then

hpacucli controller slot=1 array A add drives=1:8

and will the array rebuild automatically?

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5 Answers

up vote 1 down vote accepted

It is safe to run those commands. The mirror group can survive the absence of one disk. It should rebuild automatically, but if it doesn't the command you already identified will kick it into gear.

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Is this based on experience with HP servers yourself? I favour your solution simply because if a disk is being written to when physically removed from an array the disk heads will be on the plater and could cause damage to the disk itself. I'd rather the drive was out of the array and spun down. Which is hopefully what the commands should do. – gilesw Feb 10 '11 at 10:22
@User70139 The SmartArray cards are smart enough to stop writing to a disk that's in pre-fail and start the fail-light blinking. I/O has already been quiesced by the card. The drive is still spinning, but the heads aren't being used. If you're concerned, when pulling the old drive out, pull it out an inch and wait 10 seconds before fully pulling it out. – sysadmin1138♦ Feb 10 '11 at 14:57
As long as your HP disks have red handles, they're hot-swap compatible and can be pulled from the server at any time, even when spinning. Obviously you don't want to flail it around until it's had 10-15 seconds to stop the platters spinning. In fact, just don't flail 'em around ever and you should be fine. Drive rebuild/replacment is the responsibility of the controller and you don't need to worry about executing any commands before or after pulling a failed drive. It's all happening further down the stack. – Chris Thorpe Apr 8 '11 at 7:22
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up vote 4 down vote

You can just pull the dead disk and replace it - there's no need for OS involvement at all.

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up vote 1 down vote

The sequence of commands that you specify do not work on our Smart Array 641/642 controllers. A This operation is not supported with the current configuration error is encounter. On my class of array, these commands do not work, even if all the disks are properly operation. The best solution is to ewwhite's process to blink the drive, and physically replace.

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up vote 0 down vote

A drive with prefailure won't necessarily have an LED indicator (sometimes it's a slow amber blink), so identifying it for smart hands is a good idea. You don't need to remove the drive from the array or re-add it, though. Those functions will be handled by the controller automatically. All you will need is the hpacucli controller slot=1 pd 1:8 modify led=on line.

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up vote 0 down vote

Well, one clarification in the above question, it is RAID 10, so the total space should be 72 x 2 and not 72 x 4 as shown by the controller.

Size: 273.3 GB

correct me if I am wrong on this. It is 10 not 01.

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