http://www.be.kernel.org/pub/linux/utils/raid/mdadm/mdadm-1.11.0.tar.gz
on Red Hat Advanced Server 2.1 most recent kernel update:
# cat /proc/version
Linux version 2.4.9-e.62enterprise (bhcompile@xxxxxxxxxxxxxxxxxxxxxxx) (gcc version 2.96 20000731 (Red Hat Linux 7.2 2.96-129.7.2)) #1 SMP Fri Apr 8 18:46:17 EDT 2005
Kind regards,
Herta
Tyler wrote:
What version were you trying? 1.9.0 and 1.11.0 are considered the latest stable versions i believe.
Regards, Tyler.
Herta Van den Eynde wrote:
FWIIW, I reverted to mdadm-1.4.0-1, and that version creates the RAID1+0 just fine.
Herta
Herta Van den Eynde wrote:
OK, there's definitely something wrong here. I ran a # mdadm --zero-superblock --force /dev/sdX followed by # dd if=/dev/zero of=/dev/sdX bs=64k where X=[g-in-p], and when I try to create a RAID 1 using two of these devices, it still sets the size to 139904K. When I create a RAID 0 using the same devices, mdadm does set the size correctly.
# mdadm --create --verbose /dev/md6 --level=1 --raid-devices=2 /dev/sdh /dev/sdo mdadm: size set to 139904K mdadm: array /dev/md6 started.
# mdadm --create --verbose /dev/md6 --level=0 --raid-devices=2 /dev/sdh /dev/sdo mdadm: chunk size defaults to 64K mdadm: array /dev/md6 started. # mke2fs -j -v /dev/md6 (...) # mount /dev/md6 /mnt; df /mnt Filesystem 1k-blocks Used Available Use% Mounted on /dev/md6 141124600 32828 133923052 1% /mnt
Is this a bug, or am I overlooking something?
Herta
Herta Van den Eynde wrote:
Red Hat AS 2.1 mdadm 1.11
I have two devices that used to be part of a now corrupt RAID10 configuration. When I try to reuse them to create a RAID1, it only uses about 1 third of the diskspace available.
# fdisk -l /dev/sdg
Disk /dev/sdg: 255 heads, 63 sectors, 8924 cylinders Units = cylinders of 16065 * 512 bytes
Device Boot Start End Blocks Id System /dev/sdg1 1 8924 71681998+ fd Linux raid autodetect
# fdisk -l /dev/sdn
Disk /dev/sdn: 255 heads, 63 sectors, 8924 cylinders Units = cylinders of 16065 * 512 bytes
Device Boot Start End Blocks Id System /dev/sdn1 1 8924 71681998+ fd Linux raid autodetect
# mdadm --create --verbose /dev/md5 --level=1 --raid-devices=2 /dev/sdg /dev/sdn
mdadm: /dev/sdg appears to contain an ext2fs file system
size=419520K mtime=Mon May 2 17:04:04 2005
mdadm: /dev/sdn appears to contain an ext2fs file system
size=419520K mtime=Mon May 2 17:04:04 2005
mdadm: size set to 139904K
Continue creating array? n
If I try to add the --size option, even a size that is 139904K or less, it tells me the size is invalid:
# mdadm --create --verbose /dev/md5 --level=1 --raid-devices=2 /dev/sdg /dev/sdn --size=139904K
mdadm: invalid size: 139904K
I did reboot the system after fdisk'ing the devices.
Do I need to low-level format these devices to be able to reuse them?
Kind regards,
Herta
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-- Herta Van den Eynde -=- Toledo system management K.U. Leuven - Ludit -=- phone: +32 (0)16 322 166 -=- 50°51'27" N 004°40'39" E
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