Mailinglist Archive: opensuse (3729 mails)
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Re: [SLE] Testing Raid1 set-up: Failed hard disk
- From: Lenz Grimmer <lenz@xxxxxxxxxxx>
- Date: Fri, 20 Jun 2003 12:51:21 +0200 (CEST)
- Message-id: <Pine.LNX.4.53.0306201245380.3227@xxxxxxxxxxxxxx>
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On Fri, 20 Jun 2003, Blaes, Rainer wrote:
> in order to simulate a drive failure in our environment
> running SLES 8 with Raid1 for the system disk (set-up via
> Yast2) we
> - plugged out one drive
While the system was running? Ouch. What kind of disk drive is this? Are
you sure that it's capable of such "hot-plugging"? From the
Software-RAID-HOWTO:
5.1 Simulating a drive failure
If you want to simulate a drive failure, then plug out the drive. You
should do this with the power off. If you are interested in testing
whether your data can survive with a disk less than the usual number,
there is no point in being a hot-plug cowboy here. Take the system
down, unplug the disk, and boot it up again.
> - shutdown the system ====> system is hanging
This is most likely the kernel's IDE layer (if it was an IDE disk),
getting confused about the missing disk.
> - power off + booting ====> system is hanging during fsck
> cycle
This should usually not happen, but might be due to the way you shut down
the drive before. What file system are you using? What does /proc/mdstat
tell you?
> - power off + reconnection of the former disk =====> system
> came up successfully
> Any help, tips for a proper handling of this scenario are welcome
> especially if we have to insert a "new" disk!
Take a look at the excellent Software-RAID-HOWTO - it gives many detailed
and helpful hints.
/usr/share/doc/howto/en/html/Software-RAID-HOWTO.html
Bye,
LenZ
- --
- ------------------------------------------------------------------
Lenz Grimmer <lenz@xxxxxxxxxxx> -o)
[ICQ: 160767607 | Jabber: LenZGr@xxxxxxxxxx] /\\
http://lenz.grimmer.com V_V
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On Fri, 20 Jun 2003, Blaes, Rainer wrote:
> in order to simulate a drive failure in our environment
> running SLES 8 with Raid1 for the system disk (set-up via
> Yast2) we
> - plugged out one drive
While the system was running? Ouch. What kind of disk drive is this? Are
you sure that it's capable of such "hot-plugging"? From the
Software-RAID-HOWTO:
5.1 Simulating a drive failure
If you want to simulate a drive failure, then plug out the drive. You
should do this with the power off. If you are interested in testing
whether your data can survive with a disk less than the usual number,
there is no point in being a hot-plug cowboy here. Take the system
down, unplug the disk, and boot it up again.
> - shutdown the system ====> system is hanging
This is most likely the kernel's IDE layer (if it was an IDE disk),
getting confused about the missing disk.
> - power off + booting ====> system is hanging during fsck
> cycle
This should usually not happen, but might be due to the way you shut down
the drive before. What file system are you using? What does /proc/mdstat
tell you?
> - power off + reconnection of the former disk =====> system
> came up successfully
> Any help, tips for a proper handling of this scenario are welcome
> especially if we have to insert a "new" disk!
Take a look at the excellent Software-RAID-HOWTO - it gives many detailed
and helpful hints.
/usr/share/doc/howto/en/html/Software-RAID-HOWTO.html
Bye,
LenZ
- --
- ------------------------------------------------------------------
Lenz Grimmer <lenz@xxxxxxxxxxx> -o)
[ICQ: 160767607 | Jabber: LenZGr@xxxxxxxxxx] /\\
http://lenz.grimmer.com V_V
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