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Old 25th January 2010, 19:01
DrJohn DrJohn is offline
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Default Quota with LVM + RAID1

I'm following the perfect Ubuntu 9.10 server [IspConfig2] tutorial. I installed quota as recommended, but after rebooting I get a lot (~1/second) of faults and stack dumps related to the quota tasks. Stopping quota:
Code:
$ quotaoff -avug
causes the faults to cease.
Quota is set up on /, which is one of several LVM volumes on a single LVM volume group, installed over a RAID1 partition. Is there a different way to set up quota in this situation?
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Old 26th January 2010, 15:02
falko falko is offline
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Can you post some of the error messages?

What's in /etc/fstab?
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Old 26th January 2010, 16:32
DrJohn DrJohn is offline
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Here's a representative bit from syslog:
Code:
Jan 24 21:19:37 M3N78EM kernel: [  770.042822] ------------[ cut here ]------------
Jan 24 21:19:37 M3N78EM kernel: [  770.042845] WARNING: at /build/buildd/linux-2.6.31/fs/quota/dquot.c:964 dquot_claim_space+0x15d/0x170()
Jan 24 21:19:37 M3N78EM kernel: [  770.042850] Hardware name: System Product Name
Jan 24 21:19:37 M3N78EM kernel: [  770.042854] Modules linked in: quota_v2 quota_tree snd_hda_codec_nvhdmi snd_hda_codec_realtek snd_hda_intel snd$
Jan 24 21:19:37 M3N78EM kernel: [  770.042928] Pid: 46, comm: pdflush Not tainted 2.6.31-17-server #54-Ubuntu
Jan 24 21:19:37 M3N78EM kernel: [  770.042933] Call Trace:
Jan 24 21:19:37 M3N78EM kernel: [  770.042949]  [<ffffffff8105e668>] warn_slowpath_common+0x78/0xb0
Jan 24 21:19:37 M3N78EM kernel: [  770.042956]  [<ffffffff8105e6af>] warn_slowpath_null+0xf/0x20
Jan 24 21:19:37 M3N78EM kernel: [  770.042961]  [<ffffffff8116ebed>] dquot_claim_space+0x15d/0x170
Jan 24 21:19:37 M3N78EM kernel: [  770.042974]  [<ffffffff811dadb6>] ext4_mb_mark_diskspace_used+0x356/0x3a0
Jan 24 21:19:37 M3N78EM kernel: [  770.042980]  [<ffffffff811db0a9>] ext4_mb_new_blocks+0x2a9/0x540
Jan 24 21:19:37 M3N78EM kernel: [  770.042988]  [<ffffffff811d0a59>] ? ext4_ext_find_extent+0x2b9/0x2f0
Jan 24 21:19:37 M3N78EM kernel: [  770.042994]  [<ffffffff811d2754>] ext4_ext_get_blocks+0x4a4/0x5b0
Jan 24 21:19:37 M3N78EM kernel: [  770.043000]  [<ffffffff811b35b9>] ext4_get_blocks+0x1d9/0x210
Jan 24 21:19:37 M3N78EM kernel: [  770.043005]  [<ffffffff811b3f97>] mpage_da_map_blocks+0xa7/0x370
Jan 24 21:19:37 M3N78EM kernel: [  770.043013]  [<ffffffff811e9ace>] ? jbd2_journal_start+0xae/0x100
Jan 24 21:19:37 M3N78EM kernel: [  770.043018]  [<ffffffff811b4503>] ext4_da_writepages+0x2a3/0x500
Jan 24 21:19:37 M3N78EM kernel: [  770.043027]  [<ffffffff810e31b8>] do_writepages+0x28/0x50
Jan 24 21:19:37 M3N78EM kernel: [  770.043034]  [<ffffffff8113e8ec>] writeback_single_inode+0x1bc/0x450
Jan 24 21:19:37 M3N78EM kernel: [  770.043040]  [<ffffffff8113f208>] generic_sync_sb_inodes+0x418/0x530
Jan 24 21:19:37 M3N78EM kernel: [  770.043045]  [<ffffffff8113f42b>] writeback_inodes+0x5b/0x100
Jan 24 21:19:37 M3N78EM kernel: [  770.043051]  [<ffffffff810e1f4c>] wb_kupdate+0xbc/0x140
Jan 24 21:19:37 M3N78EM kernel: [  770.043056]  [<ffffffff810e39be>] __pdflush+0x13e/0x260
Jan 24 21:19:37 M3N78EM kernel: [  770.043062]  [<ffffffff810e3ae0>] ? pdflush+0x0/0x50
Jan 24 21:19:37 M3N78EM kernel: [  770.043069]  [<ffffffff810e3b28>] pdflush+0x48/0x50
Jan 24 21:19:37 M3N78EM kernel: [  770.043074]  [<ffffffff810e1e90>] ? wb_kupdate+0x0/0x140
Jan 24 21:19:37 M3N78EM kernel: [  770.043081]  [<ffffffff810e3ae0>] ? pdflush+0x0/0x50
Jan 24 21:19:37 M3N78EM kernel: [  770.043087]  [<ffffffff81078226>] kthread+0xa6/0xb0
Jan 24 21:19:37 M3N78EM kernel: [  770.043095]  [<ffffffff810130aa>] child_rip+0xa/0x20
Jan 24 21:19:37 M3N78EM kernel: [  770.043100]  [<ffffffff81078180>] ? kthread+0x0/0xb0
Jan 24 21:19:37 M3N78EM kernel: [  770.043104]  [<ffffffff810130a0>] ? child_rip+0x0/0x20
Jan 24 21:19:37 M3N78EM kernel: [  770.043107] ---[ end trace 7808f3b36ab85b6f ]---
and here's fstab, unmodified from install except for the addition of the parameters related to quota:
Code:
# /etc/fstab: static file system information.
#
# Use 'blkid -o value -s UUID' to print the universally unique identifier
# for a device; this may be used with UUID= as a more robust way to name
# devices that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>
proc            /proc           proc    defaults        0       0
/dev/mapper/M3N78EM_VG1-M3N78EM_V2_ROOT /               ext4    errors=remount-ro,usrjquota=aquota.user,grpjquota=aquota.group,jqfmt=vfsv0 0       1
# /boot was on /dev/md0 during installation
UUID=dd2394e9-c13c-45ae-b503-1f8d0a1ebc14 /boot           ext4    defaults        0       2
/dev/mapper/M3N78EM_VG1-M3N78EM_V3_HOME /home           ext4    defaults        0       2
/dev/mapper/M3N78EM_VG1-M3N78EM_V1 none            swap    sw              0       0
/dev/scd0       /media/cdrom0   udf,iso9660 user,noauto,exec,utf8 0       0
/dev/fd0        /media/floppy0  auto    rw,user,noauto,exec,utf8 0       0
as always your help is much appreciated!
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Old 27th January 2010, 15:17
falko falko is offline
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Hm, fstab looks ok. Not sure what to make of the error messages. Is this the default Ubuntu kernel that you are using?
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Old 27th January 2010, 17:29
DrJohn DrJohn is offline
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The install is straight off the 9.10 server CD followed by aptitude update / safe-upgrade:
Code:
~$ uname -srvmo
Linux 2.6.31-17-server #54-Ubuntu SMP Thu Dec 10 18:06:56 UTC 2009 x86_64 GNU/Linux
apparmour was disabled / removed per the tutorial.
/etc/mtab seems OK:
Code:
:/etc$ cat mtab
/dev/mapper/M3N78EM_VG1-M3N78EM_V2_ROOT / ext4 rw,errors=remount-ro,usrjquota=aquota.user,grpjquota=aquota.group,jqfmt=vfsv0 0 0
proc /proc proc rw 0 0
none /sys sysfs rw,noexec,nosuid,nodev 0 0
none /sys/fs/fuse/connections fusectl rw 0 0
none /sys/kernel/debug debugfs rw 0 0
none /sys/kernel/security securityfs rw 0 0
udev /dev tmpfs rw,mode=0755 0 0
none /dev/pts devpts rw,noexec,nosuid,gid=5,mode=0620 0 0
none /dev/shm tmpfs rw,nosuid,nodev 0 0
none /var/run tmpfs rw,nosuid,mode=0755 0 0
none /var/lock tmpfs rw,noexec,nosuid,nodev 0 0
none /lib/init/rw tmpfs rw,nosuid,mode=0755 0 0
/dev/mapper/M3N78EM_VG1-M3N78EM_V3_HOME /home ext4 rw 0 0
/dev/md0 /boot ext4 rw 0 0
I have not explicitly set any quota limits, and the quotas for root and my username are at zero (output of 'edquota root'):
Code:
Disk quotas for user root (uid 0):
  Filesystem                   blocks       soft       hard     inodes     soft     hard
  /dev/mapper/M3N78EM_VG1-M3N78EM_V2_ROOT    1033732          0          0      53073        0        0
The result of edquota for my username shows no disk usage, which is accurate since my home folder is currently empty:
Code:
Disk quotas for user username (uid 1000):
  Filesystem                   blocks       soft       hard     inodes     soft     hard
  /dev/mapper/M3N78EM_VG1-M3N78EM_V2_ROOT          0          0          0          0        0        0
I notice here, however, that quota is reporting the ROOT volume and not the HOME volume where my /home folder is mounted. I'm not familiar enough with quota to know if it should report both volumes here?
I have installed, configured, and started shorewall via aptitude by enabling in /etc/apt/sources.list:
Code:
deb http://archive.canonical.com/ubuntu karmic partner
deb-src http://archive.canonical.com/ubuntu karmic partner
so that the only uncommented sources here are the backports. I only mention it because this was the only off-tutorial part (yet).

BTW, this is a test install on a spare for trying out 9.10 prior to replacing the old server h/w . In a few days I will receive the new server hardware, and I plan to do the 'real' install over the weekend. Perhaps there's something I can do along the way to help discover what happened here.
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Old 9th February 2010, 03:51
HARMANE HARMANE is offline
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Any resolution to this? I'm seeing the same.

Code:
Feb 8 21:44:52 soapbox kernel: [36770.130681] [] ? child_rip+0x0/0x20
Feb 8 21:44:52 soapbox kernel: [36770.130683] ---[ end trace 807496c710666e46 ]---
Feb 8 21:44:52 soapbox kernel: [36770.130686] ------------[ cut here ]------------
Feb 8 21:44:52 soapbox kernel: [36770.130690] WARNING: at /build/buildd/linux-2.6.31/fs/quota/dquot.c:964 dquot_claim_space+0x15d/0x170()
Feb 8 21:44:52 soapbox kernel: [36770.130693] Hardware name: eserver xSeries 236 -[884105U]-
Feb 8 21:44:52 soapbox kernel: [36770.130695] Modules linked in: xt_multiport xt_tcpudp xt_state ipt_LOG nf_conntrack_ftp iptable_mangle iptable_nat nf_nat nf_conntrack_ipv4 nf_conntrack nf_defrag_ipv4 osst st quota_v2 quota_tree iptable_filter ip_tables radeon x_tables ttm drm i2c_algo_bit ppdev psmouse shpchp e752x_edac parport_pc lp serio_raw edac_core parport raid10 raid456 usbhid raid6_pq async_xor async_memcpy async_tx xor raid1 raid0 aic79xx ips scsi_transport_spi multipath floppy tg3 linear
Feb 8 21:44:52 soapbox kernel: [36770.130743] Pid: 46, comm: pdflush Tainted: G W 2.6.31-19-server #56-Ubuntu
Feb 8 21:44:52 soapbox kernel: [36770.130745] Call Trace:
Feb 8 21:44:52 soapbox kernel: [36770.130750] [] warn_slowpath_common+0x78/0xb0
Feb 8 21:44:52 soapbox kernel: [36770.130755] [] warn_slowpath_null+0xf/0x20
Feb 8 21:44:52 soapbox kernel: [36770.130760] [] dquot_claim_space+0x15d/0x170
Feb 8 21:44:52 soapbox kernel: [36770.130764] [] ext4_mb_mark_diskspace_used+0x356/0x3a0
Feb 8 21:44:52 soapbox kernel: [36770.130769] [] ext4_mb_new_blocks+0x2a9/0x540
Feb 8 21:44:52 soapbox kernel: [36770.130774] [] ? ext4_ext_find_extent+0x130/0x2f0
Feb 8 21:44:52 soapbox kernel: [36770.130778] [] ext4_ext_get_blocks+0x4a4/0x5b0
Feb 8 21:44:52 soapbox kernel: [36770.130783] [] ext4_get_blocks+0x1d9/0x210
Feb 8 21:44:52 soapbox kernel: [36770.130787] [] mpage_da_map_blocks+0xa7/0x370
Feb 8 21:44:52 soapbox kernel: [36770.130792] [] ? jbd2_journal_start+0xae/0x100
Feb 8 21:44:52 soapbox kernel: [36770.130796] [] ext4_da_writepages+0x2a3/0x500
Feb 8 21:44:52 soapbox kernel: [36770.130801] [] do_writepages+0x28/0x50
Feb 8 21:44:52 soapbox kernel: [36770.130806] [] writeback_single_inode+0x1bc/0x450
Feb 8 21:44:52 soapbox kernel: [36770.130811] [] generic_sync_sb_inodes+0x418/0x530
Feb 8 21:44:52 soapbox kernel: [36770.130815] [] writeback_inodes+0x5b/0x100
Feb 8 21:44:52 soapbox kernel: [36770.130820] [] wb_kupdate+0xbc/0x140
Feb 8 21:44:52 soapbox kernel: [36770.130824] [] __pdflush+0x13e/0x260
Feb 8 21:44:52 soapbox kernel: [36770.130829] [] ? pdflush+0x0/0x50
Feb 8 21:44:52 soapbox kernel: [36770.130833] [] pdflush+0x48/0x50
Feb 8 21:44:52 soapbox kernel: [36770.130837] [] ? wb_kupdate+0x0/0x140
Feb 8 21:44:52 soapbox kernel: [36770.130841] [] ? pdflush+0x0/0x50
Feb 8 21:44:52 soapbox kernel: [36770.130846] [] kthread+0xa6/0xb0
Feb 8 21:44:52 soapbox kernel: [36770.130850] [] child_rip+0xa/0x20
Feb 8 21:44:52 soapbox kernel: [36770.130854] [] ? kthread+0x0/0xb0
Feb 8 21:44:52 soapbox kernel: [36770.130858] [] ? child_rip+0x0/0x20
Feb 8 21:44:52 soapbox kernel: [36770.130860] ---[ end trace 807496c710666e47 ]---
Feb 8 21:44:52 soapbox kernel: [36770.130985] ------------[ cut here ]------------
Feb 8 21:44:52 soapbox kernel: [36770.130992] WARNING: at /build/buildd/linux-2.6.31/fs/quota/dquot.c:964 dquot_claim_space+0x147/0x170()
Feb 8 21:44:52 soapbox kernel: [36770.130995] Hardware name: eserver xSeries 236 -[884105U]-
Feb 8 21:44:52 soapbox kernel: [36770.130997] Modules linked in: xt_multiport xt_tcpudp xt_state ipt_LOG nf_conntrack_ftp iptable_mangle iptable_nat nf_nat nf_conntrack_ipv4 nf_conntrack nf_defrag_ipv4 osst st quota_v2 quota_tree iptable_filter ip_tables radeon x_tables ttm drm i2c_algo_bit ppdev psmouse shpchp e752x_edac parport_pc lp serio_raw edac_core parport raid10 raid456 usbhid raid6_pq async_xor async_memcpy async_tx xor raid1 raid0 aic79xx ips scsi_transport_spi multipath floppy tg3 linear
Feb 8 21:44:52 soapbox kernel: [36770.131047] Pid: 46, comm: pdflush Tainted: G W 2.6.31-19-server #56-Ubuntu
Feb 8 21:44:52 soapbox kernel: [36770.131050] Call Trace:
Feb 8 21:44:52 soapbox kernel: [36770.131056] [] warn_slowpath_common+0x78/0xb0
Feb 8 21:44:52 soapbox kernel: [36770.131060] [] warn_slowpath_null+0xf/0x20
Feb 8 21:44:52 soapbox kernel: [36770.131065] [] dquot_claim_space+0x147/0x170
Feb 8 21:44:52 soapbox kernel: [36770.131069] [] ext4_mb_mark_diskspace_used+0x356/0x3a0
Feb 8 21:44:52 soapbox kernel: [36770.131074] [] ext4_mb_new_blocks+0x2a9/0x540
Feb 8 21:44:52 soapbox kernel: [36770.131079] [] ? ext4_ext_find_extent+0x130/0x2f0
Feb 8 21:44:52 soapbox kernel: [36770.131084] [] ext4_ext_get_blocks+0x4a4/0x5b0
Feb 8 21:44:52 soapbox kernel: [36770.131088] [] ext4_get_blocks+0x1d9/0x210
Feb 8 21:44:52 soapbox kernel: [36770.131093] [] mpage_da_map_blocks+0xa7/0x370
Feb 8 21:44:52 soapbox kernel: [36770.131097] [] ? jbd2_journal_start+0xae/0x100
Feb 8 21:44:52 soapbox kernel: [36770.131101] [] ext4_da_writepages+0x2a3/0x500
Feb 8 21:44:52 soapbox kernel: [36770.131107] [] do_writepages+0x28/0x50
Feb 8 21:44:52 soapbox kernel: [36770.131111] [] writeback_single_inode+0x1bc/0x450
Feb 8 21:44:52 soapbox kernel: [36770.131116] [] generic_sync_sb_inodes+0x418/0x530
Feb 8 21:44:52 soapbox kernel: [36770.131121] [] writeback_inodes+0x5b/0x100
Feb 8 21:44:52 soapbox kernel: [36770.131125] [] wb_kupdate+0xbc/0x140
Feb 8 21:44:52 soapbox kernel: [36770.131130] [] __pdflush+0x13e/0x260
Feb 8 21:44:52 soapbox kernel: [36770.131134] [] ? pdflush+0x0/0x50
Feb 8 21:44:52 soapbox kernel: [36770.131138] [] pdflush+0x48/0x50
Feb 8 21:44:52 soapbox kernel: [36770.131142] [] ? wb_kupdate+0x0/0x140
Feb 8 21:44:52 soapbox kernel: [36770.131147] [] ? pdflush+0x0/0x50
Feb 8 21:44:52 soapbox kernel: [36770.131151] [] kthread+0xa6/0xb0
Feb 8 21:44:52 soapbox kernel: [36770.131155] [] child_rip+0xa/0x20
Feb 8 21:44:52 soapbox kernel: [36770.131160] [] ? kthread+0x0/0xb0
Feb 8 21:44:52 soapbox kernel: [36770.131163] [] ? child_rip+0x0/0x20
Feb 8 21:44:52 soapbox kernel: [36770.131166] ---[ end trace 807496c710666e48 ]---
Feb 8 21:44:52 soapbox kernel: [36770.131168] ------------[ cut here ]------------
Feb 8 21:44:52 soapbox kernel: [36770.131172] WARNING: at /build/buildd/linux-2.6.31/fs/quota/dquot.c:964 dquot_claim_space+0x15d/0x170()
Feb 8 21:44:52 soapbox kernel: [36770.131175] Hardware name: eserver xSeries 236 -[884105U]-
Feb 8 21:44:53 soapbox kernel: [36770.131177] Modules linked in: xt_multiport xt_tcpudp xt_state ipt_LOG nf_conntrack_ftp iptable_mangle iptable_nat nf_nat nf_conntrack_ipv4 nf_conntrack nf_defrag_ipv4 osst st quota_v2 quota_tree iptable_filter ip_tables radeon x_tables ttm drm i2c_algo_bit ppdev psmouse shpchp e752x_edac parport_pc lp serio_raw edac_core parport raid10 raid456 usbhid raid6_pq async_xor async_memcpy async_tx xor raid1 raid0 aic79xx ips scsi_transport_spi multipath floppy tg3 linear
Feb 8 21:44:53 soapbox kernel: [36770.131226] Pid: 46, comm: pdflush Tainted: G W 2.6.31-19-server #56-Ubuntu
Feb 8 21:44:53 soapbox kernel: [36770.131229] Call Trace:
Feb 8 21:44:53 soapbox kernel: [36770.131234] [] warn_slowpath_common+0x78/0xb0
Feb 8 21:44:53 soapbox kernel: [36770.131239] [] warn_slowpath_null+0xf/0x20
Feb 8 21:44:53 soapbox kernel: [36770.131243] [] dquot_claim_space+0x15d/0x170
Feb 8 21:44:53 soapbox kernel: [36770.131248] [] ext4_mb_mark_diskspace_used+0x356/0x3a0
Feb 8 21:44:53 soapbox kernel: [36770.131252] [] ext4_mb_new_blocks+0x2a9/0x540
Feb 8 21:44:53 soapbox kernel: [36770.131257] [] ? ext4_ext_find_extent+0x130/0x2f0
Feb 8 21:44:53 soapbox kernel: [36770.131262] [] ext4_ext_get_blocks+0x4a4/0x5b0
Feb 8 21:44:53 soapbox kernel: [36770.131266] [] ext4_get_blocks+0x1d9/0x210
Feb 8 21:44:53 soapbox kernel: [36770.131271] [] mpage_da_map_blocks+0xa7/0x370
Feb 8 21:44:53 soapbox kernel: [36770.131275] [] ? jbd2_journal_start+0xae/0x100
Feb 8 21:44:53 soapbox kernel: [36770.131279] [] ext4_da_writepages+0x2a3/0x500
Feb 8 21:44:53 soapbox kernel: [36770.131285] [] do_writepages+0x28/0x50
Feb 8 21:44:53 soapbox kernel: [36770.131289] [] writeback_single_inode+0x1bc/0x450
Feb 8 21:44:53 soapbox kernel: [36770.131294] [] generic_sync_sb_inodes+0x418/0x530
Feb 8 21:44:53 soapbox kernel: [36770.131299] [] writeback_inodes+0x5b/0x100
Feb 8 21:44:53 soapbox kernel: [36770.131303] [] wb_kupdate+0xbc/0x140
Feb 8 21:44:53 soapbox kernel: [36770.131308] [] __pdflush+0x13e/0x260
Feb 8 21:44:53 soapbox kernel: [36770.131312] [] ? pdflush+0x0/0x50
Feb 8 21:44:53 soapbox kernel: [36770.131316] [] pdflush+0x48/0x50
Feb 8 21:44:53 soapbox kernel: [36770.131320] [] ? wb_kupdate+0x0/0x140
Feb 8 21:44:53 soapbox kernel: [36770.131325] [] ? pdflush+0x0/0x50
Feb 8 21:44:53 soapbox kernel: [36770.131329] [] kthread+0xa6/0xb0
Feb 8 21:44:53 soapbox kernel: [36770.131333] [] child_rip+0xa/0x20
Feb 8 21:44:53 soapbox kernel: [36770.131338] [] ? kthread+0x0/0xb0
Feb 8 21:44:53 soapbox kernel: [36770.131341] [] ? child_rip+0x0/0x20
Feb 8 21:44:53 soapbox kernel: [36770.131344] ---[ end trace 807496c710666e49 ]---
Feb 8 21:45:01 soapbox pure-ftpd: (?@127.0.0.1) [INFO] New connection from 127.0.0.1
Feb 8 21:45:01 soapbox pure-ftpd: (?@127.0.0.1) [INFO] Logout.
 
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  #7  
Old 9th February 2010, 20:35
DrJohn DrJohn is offline
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I resolved this specific problem by changing the configuration. I now have a single 318Gb LVM volume group running on top of a RAID1 device on a pair of physical drives. A small second RAID1 on the same pair is mounted as /boot (non-LVM).

The LVM volume group has two logical drives for the host system: one as swap and the other with 20G at /root. This part of the install is pretty much static; quota is not installed. The rest of the volume group space hosts several KVM instances. Each KVM was created on separate logical volumes of 20 - 40 Gb apiece mounted at (root) ~/vm1, ~/vm2, ...

One of them (an ISPConfig webserver) is now running quota without a problem, the other (a document management install) will have it shortly. If there is a problem I'll post it here.

All of this is to say that the original problem remains intact as far as I know, but at this point I won't be going back to fix it.
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