-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hello there! Currently I am trying to set up LVM on top of RAID-5. I am using Kernel 2.6.12.2, device-mapper 1.01.04-r2 and lvm2 2.01.15-r1 on an NSLU2 (big endian ARM) with three USB hard disks connected (two via a hub). My problem is that I cannot create any volume groups; even physical volumes cause trouble: After typing root@platon:/etc# pvcreate /dev/md0 the messages of "pvscan" randomly change without doing anything in between - sometimes two error messages appear, sometimes there are three (see attachment 1). Similar things happen when trying to set up a volume group with root@platon:/etc# vgcreate -s 64M data /dev/md0 Incorrect metadata area header checksum Incorrect metadata area header checksum Volume group "data" successfully created When scanning for volume groups using "vgscan", error messages change, but the volume group is never found (see attachment 2). I set up the device-filter in lvm.conf correctly such that only md-devices are detected: When increasing the loglevel, it can be seen that the errors are indeed related to the md-device (see attachment 3). The weird thing is the fact that errors change from call to call. So this must be a timing problem (I don't have another explanation for it)?! However, I could write an ext3-file system to /dev/md0 and mount it afterwards without any problems. If anyone could help me, that'd be great! Fabian - ----------------------------------------------------------------------- Attachment 1: root@platon:/etc# pvscan /dev/md0 Incorrect metadata area header checksum Incorrect metadata area header checksum Incorrect metadata area header checksum PV /dev/md0 lvm2 [372.28 GB] Total: 1 [372.28 GB] / in use: 0 [0 ] / in no VG: 1 [372.28 GB] root@platon:/etc# pvscan /dev/md0 Incorrect metadata area header checksum Incorrect metadata area header checksum PV /dev/md0 lvm2 [372.28 GB] Total: 1 [372.28 GB] / in use: 0 [0 ] / in no VG: 1 [372.28 GB] - ----------------------------------------------------------------------- Attachment 2: root@platon:/etc# vgscan Reading all physical volumes. This may take a while... Incorrect metadata area header checksum root@platon:/etc# vgscan Reading all physical volumes. This may take a while... No volume groups found root@platon:/etc# vgscan Reading all physical volumes. This may take a while... Incorrect metadata area header checksum - ----------------------------------------------------------------------- Attachment 2: #label/label.c:168 /dev/md0: lvm2 label detected #device/dev-io.c:484 Closed /dev/md0 #device/dev-io.c:438 Opened /dev/md0 RO O_DIRECT #device/dev-io.c:134 /dev/md0: block size is 4096 bytes #format_text/format-text.c:136 Incorrect metadata area header checksum #format_text/format-text.c:838 <backtrace> #device/dev-io.c:484 Closed /dev/md0 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.1 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org iD8DBQFD0MZsbJzYO4mghQIRAhYlAJ0RdWYmBfv0XTP0bJVrItwYwtoGfACfejc9 x0CRv9U3gNtZANXEQXP5yVs= =Z1NP -----END PGP SIGNATURE----- _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
