[linux-lvm] LVM on ATA-Raid Working - but Poorly
Nathan Dornquast
Nathan at Aberon.Net
Wed Oct 16 23:57:22 UTC 2002
Hi all,
First, Thx to Heinz for not only writing great code, but taking the time to
document and respond to inquires.
I have read the white paper and many, many mailings on this list, but I haven't
seen anything addressing my problem.
Problem:
After creating LVM Vol Group (VG1) and single Log. Vol (lvol1) on ataraid
mirrored drives (/dev/ataraid/d0p3) only one drives seems to get used.
I have repeated this process several times -
1. Set up pvcreate - pvcreate /dev/ataraid/d0p1 - success
2. Run pvscan: Reports
pvscan -- reading all physical volumes (this may take a while...)
pvscan -- inactive PV "/dev/ataraid/d0p3" is in no VG [109.32 GB]
pvscan -- inactive PV "/dev/hdc3" is in no VG [109.32 GB]
pvscan -- inactive PV "/dev/hda3" is in no VG [109.32 GB]
pvscan -- total: 2 [327.96 GB] / in use: 0 [0] / in no VG: 2 [327.96 GB]
3. Run vgcreate -s 64 VG1 /dev/ataraid/d0p3 - success
4. Run pvscan: Reports
pvscan -- reading all physical volumes (this may take a while...)
pvscan -- ACTIVE PV "/dev/ataraid/d0p3" is in no VG [109.32 GB]
pvscan -- inactive PV "/dev/hdc3" is in no VG [109.32 GB]
pvscan -- inactive PV "/dev/hda3" is in no VG [109.32 GB]
pvscan -- total: 3 [327.96 GB] / in use: 3 [327.96 GB] / in no VG: 0 [0]
5. Create Logical Volume goes ok.. Format with ReiserFS - reports 109 GBs or so
on mounting. Life is good, right? Until I reboot.
6. Reboot
7. Run pvscan: Reports
pvscan -- reading all physical volumes (this may take a while...)
pvscan -- inactive PV "/dev/ataraid/d0p3" is in no VG [109.32 GB]
pvscan -- inactive PV "/dev/hdc3" is in no VG [109.32 GB]
pvscan -- ACTIVE PV "/dev/hda3" is in no VG [109.32 GB]
pvscan -- total: 3 [327.96 GB] / in use: 3 [327.96 GB] / in no VG: 0 [0]
Hda3 becomes the active.. member?.. Drive activity seems to only occur on
the first drive (which is what made me dig into this in the first place. I
can't seem to make /dev/ataraid/d0p3 become active. I've tried unsucessfully
tor remove with pvchange -x y option for hda3 and hdc3, also tried vgremove.
Doesn't seem to work.
If I make it a simple ReiserFS partition /dev/ataraid/d0p3 and mount it
normally, both drives are active -- sharing writes and striping reads.
ATARaid support is in the kernel (no drives installed) and otherwise seems to
work very well - booting off it and running well on several machines.
Some Specifics:
Debian 3.0, Kernel 2.4.19, Promise built in ata raid, LVM 1.0.4, 2x WD 120 GB
drives.
..........
Nathan Dornquast
Aberon Technologies, Inc.
2205 California St NE - Suite 003
Minneapolis, MN 55418
w.612.789.9446
c.612.386.6519
..........
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