Hi,
I originally had a 250G ide drive on my system. I added a second 250G and
used raidreconf to go from non-raid to raid using "raidreconf -i
/dev/hde1 -n /etc/raidtab -m /dev/md0". The conversion suceeded, mdadm
reports that everything is ok, and the new raid0 works fine but df reports
the wrong size. Is there any way to get df to report the correct size
without wiping the data? Could I have done something with raidreconf
differently to avoid this?
Thanks,
Mike
My setup info:
meatwad / # df -k
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/md0 241263968 222247508 6760876 98% /mnt <<< that
should be ~500GB
meatwad / # cat /etc/raidtab
raiddev /dev/md0
raid-level 0
nr-raid-disks 2
chunk-size 32
persistent-superblock 1
nr-spare-disks 0
device /dev/hde1
raid-disk 0
device /dev/hdg1
raid-disk 1
meatwad / # mdadm --examine /dev/hde1
/dev/hde1:
Magic : a92b4efc
Version : 00.90.00
UUID : 12511967:044c5448:e985eb8e:860b9a60
Creation Time : Wed Jul 7 10:50:53 2004
Raid Level : raid0
Device Size : 245111616 (233.76 GiB 250.99 GB)
Raid Devices : 2
Total Devices : 2
Preferred Minor : 0
Update Time : Thu Jul 8 03:50:30 2004
State : dirty, no-errors
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
Checksum : bfcfe958 - correct
Events : 0.13
Chunk Size : 32K
Number Major Minor RaidDevice State
this 0 33 1 0 active sync
/dev/ide/host2/bus0/target0/lun0/part1
0 0 33 1 0 active sync
/dev/ide/host2/bus0/target0/lun0/part1
1 1 34 1 1 active sync
/dev/ide/host2/bus1/target0/lun0/part1
meatwad / # mdadm --examine /dev/hdg1
/dev/hdg1:
Magic : a92b4efc
Version : 00.90.00
UUID : 12511967:044c5448:e985eb8e:860b9a60
Creation Time : Wed Jul 7 10:50:53 2004
Raid Level : raid0
Device Size : 245111616 (233.76 GiB 250.99 GB)
Raid Devices : 2
Total Devices : 2
Preferred Minor : 0
Update Time : Thu Jul 8 03:50:30 2004
State : dirty, no-errors
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
Checksum : bfcfe95b - correct
Events : 0.13
Chunk Size : 32K
Number Major Minor RaidDevice State
this 1 34 1 1 active sync
/dev/ide/host2/bus1/target0/lun0/part1
0 0 33 1 0 active sync
/dev/ide/host2/bus0/target0/lun0/part1
1 1 34 1 1 active sync
/dev/ide/host2/bus1/target0/lun0/part1
meatwad / # mdadm -D /dev/md0
/dev/md0:
Version : 00.90.00
Creation Time : Wed Jul 7 10:50:53 2004
Raid Level : raid0
Array Size : 490223232 (467.51 GiB 501.99 GB)
Raid Devices : 2
Total Devices : 2
Preferred Minor : 0
Persistence : Superblock is persistent
Update Time : Thu Jul 8 03:50:30 2004
State : dirty, no-errors
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
Chunk Size : 32K
Number Major Minor RaidDevice State
0 33 1 0 active sync
/dev/ide/host2/bus0/target0/lun0/part1
1 34 1 1 active sync
/dev/ide/host2/bus1/target0/lun0/part1
UUID : 12511967:044c5448:e985eb8e:860b9a60
Events : 0.13
dmesg output from starting the array:
md: bind<ide/host2/bus0/target0/lun0/part1,2>
md: ide/host2/bus0/target0/lun0/part1's event counter: 0000000c
md: ide/host2/bus1/target0/lun0/part1's event counter: 0000000c
md0: max total readahead window set to 496k
md0: 2 data-disks, max readahead per data-disk: 248k
raid0: looking at ide/host2/bus0/target0/lun0/part1
raid0: comparing ide/host2/bus0/target0/lun0/part1(245111616) with
ide/host2/bus0/target0/lun0/part1(245111616)
raid0: END
raid0: ==> UNIQUE
raid0: 1 zones
raid0: looking at ide/host2/bus1/target0/lun0/part1
raid0: comparing ide/host2/bus1/target0/lun0/part1(245111616) with
ide/host2/bus0/target0/lun0/part1(245111616)
raid0: EQUAL
raid0: FINAL 1 zones
raid0: zone 0
raid0: checking ide/host2/bus0/target0/lun0/part1 ... contained as device 0
(245111616) is smallest!.
raid0: checking ide/host2/bus1/target0/lun0/part1 ... contained as device 1
raid0: zone->nb_dev: 2, size: 490223232
raid0: current zone offset: 245111616
raid0: done.
raid0 : md_size is 490223232 blocks.
raid0 : conf->smallest->size is 490223232 blocks.
raid0 : nb_zone is 1.
raid0 : Allocating 8 bytes for hash.
md: updating md0 RAID superblock on device
md: ide/host2/bus0/target0/lun0/part1 [events: 0000000d]<6>(write)
ide/host2/bus0/target0/lun0/part1's sb offset: 245111616
md: ide/host2/bus1/target0/lun0/part1 [events: 0000000d]<6>(write)
ide/host2/bus1/target0/lun0/part1's sb offset: 245111616
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