Obsolete Releases > SME 8.x Contribs
SME8 Storage under KVM ?
Jáder:
AFAIK this was correct.
And thi swiki page: http://wiki.contribs.org/Raid
say a 4 HDDs would be RAID5 + spare... so when you use nospare it should be a 4 HDDs RAID5... I think it's a bug... and should be reported.
Let developers say it's not a bug.
I don't think RAID5 will grow because it thinks there are a spare device!
fpausp:
I installed another machine with 4x32GB hdd, I used the same bootoptions "sme raid5 nospare". I forgot to say I used a modified sme8 iso (SME8A18V31128.iso), this is sme8 with asterisk ...
I got the same, md1 has 4 hdds and md2 has 3 plus 1 spare ...
I tried to grow with:
--- Code: ---mdadm --grow /dev/md2 --raid-devices=4
--- End code ---
And that looks good, at the moment it is growing ...
--- Code: ---cat /proc/mdstat
Personalities : [raid6] [raid5] [raid4] [raid1]
md1 : active raid1 vda1[0] vdb1[1] vdc1[2] vdd1[3]
104320 blocks [4/4] [UUUU]
md2 : active raid5 vdd2[2] vdc2[3] vdb2[1] vda2[0]
66894336 blocks super 0.91 level 5, 256k chunk, algorithm 2 [4/4] [UUUU]
[=>...................] reshape = 7.5% (2530816/33447168) finish=236.1mi n speed=2179K/sec
unused devices: <none>
--- End code ---
Stefano:
before installing it's a good thing to take a look at boot options (F2 - F3 etc)
in SME8, to create a no spare raid, you must use
--- Code: ---sme raid=5 spares=0
--- End code ---
syntax
AFAIR it's the same in the latest SME7 releases (7.5.1 for sure, just checked)
IMO wiki should be updated
fpausp:
I fired up another vm, my setup on this is 6x8GB hdd. I used "sme raid=5 sme spares=0 sme nolvm" as bootoptions.
The raid looks like:
--- Code: ---cat /proc/mdstat
Personalities : [raid6] [raid5] [raid4] [raid1]
md1 : active raid1 vdf1[5] vde1[4] vdd1[3] vdc1[2] vdb1[1] vda1[0]
104320 blocks [6/6] [UUUUUU]
md2 : active raid5 vdf2[5] vde2[4] vdd2[3] vdc2[2] vdb2[1] vda2[0]
4055040 blocks level 5, 256k chunk, algorithm 2 [6/6] [UUUUUU]
md3 : active raid5 vdf3[5] vde3[4] vdd3[3] vdc3[2] vdb3[1] vda3[0]
37350400 blocks level 5, 256k chunk, algorithm 2 [6/6] [UUUUUU]
unused devices: <none>
--- End code ---
I got only 32GB ?
--- Code: ---# df -h
Dateisystem Größe Benut Verf Ben% Eingehängt auf
/dev/md3 35G 1,7G 32G 5% /
/dev/md1 99M 12M 83M 13% /boot
tmpfs 990M 0 990M 0% /dev/shm
--- End code ---
Raid in detail:
--- Code: ---mdadm --detail /dev/md1
/dev/md1:
Version : 0.90
Creation Time : Tue May 1 11:48:10 2012
Raid Level : raid1
Array Size : 104320 (101.89 MiB 106.82 MB)
Used Dev Size : 104320 (101.89 MiB 106.82 MB)
Raid Devices : 6
Total Devices : 6
Preferred Minor : 1
Persistence : Superblock is persistent
Update Time : Tue May 1 12:13:44 2012
State : clean
Active Devices : 6
Working Devices : 6
Failed Devices : 0
Spare Devices : 0
UUID : 2721bc9b:781c581e:2148e22c:e043485f
Events : 0.2
Number Major Minor RaidDevice State
0 253 1 0 active sync /dev/vda1
1 253 17 1 active sync /dev/vdb1
2 253 33 2 active sync /dev/vdc1
3 253 49 3 active sync /dev/vdd1
4 253 65 4 active sync /dev/vde1
5 253 81 5 active sync /dev/vdf1
mdadm --detail /dev/md2
/dev/md2:
Version : 0.90
Creation Time : Tue May 1 11:48:10 2012
Raid Level : raid5
Array Size : 4055040 (3.87 GiB 4.15 GB)
Used Dev Size : 811008 (792.13 MiB 830.47 MB)
Raid Devices : 6
Total Devices : 6
Preferred Minor : 2
Persistence : Superblock is persistent
Update Time : Tue May 1 12:01:59 2012
State : clean
Active Devices : 6
Working Devices : 6
Failed Devices : 0
Spare Devices : 0
Layout : left-symmetric
Chunk Size : 256K
UUID : 1065bcce:4337aec8:28119fd4:9c8a16c2
Events : 0.6
Number Major Minor RaidDevice State
0 253 2 0 active sync /dev/vda2
1 253 18 1 active sync /dev/vdb2
2 253 34 2 active sync /dev/vdc2
3 253 50 3 active sync /dev/vdd2
4 253 66 4 active sync /dev/vde2
5 253 82 5 active sync /dev/vdf2
mdadm --detail /dev/md3
/dev/md3:
Version : 0.90
Creation Time : Tue May 1 11:48:13 2012
Raid Level : raid5
Array Size : 37350400 (35.62 GiB 38.25 GB)
Used Dev Size : 7470080 (7.12 GiB 7.65 GB)
Raid Devices : 6
Total Devices : 6
Preferred Minor : 3
Persistence : Superblock is persistent
Update Time : Tue May 1 12:25:52 2012
State : clean
Active Devices : 6
Working Devices : 6
Failed Devices : 0
Spare Devices : 0
Layout : left-symmetric
Chunk Size : 256K
UUID : cb45f02d:8634e6a0:ff716c68:6af753b4
Events : 0.312
Number Major Minor RaidDevice State
0 253 3 0 active sync /dev/vda3
1 253 19 1 active sync /dev/vdb3
2 253 35 2 active sync /dev/vdc3
3 253 51 3 active sync /dev/vdd3
4 253 67 4 active sync /dev/vde3
5 253 83 5 active sync /dev/vdf3
--- End code ---
These are the mountpoints:
--- Code: ---mount
/dev/md3 on / type ext3 (rw,usrquota,grpquota)
proc on /proc type proc (rw)
sysfs on /sys type sysfs (rw)
devpts on /dev/pts type devpts (rw,gid=5,mode=620)
/dev/md1 on /boot type ext3 (rw)
tmpfs on /dev/shm type tmpfs (rw)
none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw)
--- End code ---
I got only 32GB, is that correct ?
Stefano:
how much memory has that VM?
anyway, teorically 8x(6-1)=40 GB is the array capacity
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