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Hi all, I was in #xfs with sandeen in discussing on the above issue. In the nutshell, I can't mount /dev/hdb due to the above error: mount -t xfs /dev/hdb /path/to It all started after I did a sequence of things to the new hdd I purchased. First, I created an msdos disklabel on a new xfs partition /dev/hdb1. It uses the full capacity of the hdd. Then I transferred files from one hdd to another using mv -v /stuff-to-transfer /hdb-mount-point Upon completion, I umount both devices and rebooted. On boot, I was not able to mount neither /dev/hdb1 nor /dev/hdb. /dev/hdb1 returns mount: special device /dev/hdb1 does not exist and /dev/hdb returns the above error message, no relevant messages are present in dmesg | tail The hexdump: =================== # dd if=/dev/hdb bs=512 count=1 | hexdump -C 1+0 records in 1+0 records out 00000000 58 46 53 42 00 01 00 00 00 00 00 00 00 3a 38 b0 |XFSB.........:8.| 00000010 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| 00000020 82 fd 56 0c 80 92 4f 4a 87 8b 5e 5d 5e 55 89 aa |..V...OJ..^]^U..| 00000030 00 00 00 00 00 20 00 05 00 00 00 00 00 00 09 00 |..... ..........| 00000040 00 00 00 00 00 00 09 01 00 00 00 00 00 00 09 02 |................| 00000050 00 00 00 01 00 03 a3 8b 00 00 00 10 00 00 00 00 |................| 00000060 00 00 07 47 3c 04 80 00 01 00 01 00 00 00 00 00 |...G<...........| 00000070 00 00 00 00 00 00 00 00 10 0f 08 08 12 00 00 19 |................| 00000080 00 00 00 00 00 00 01 00 00 00 00 00 00 00 00 fd |................| 00000090 00 00 00 00 00 3a 31 18 00 00 00 00 00 00 00 00 |.....:1.........| 000000a0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 000000c0 00 0f 80 00 00 01 00 00 00 00 00 00 00 00 00 00 |................| 000000d0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 00000200 512 bytes (512 B) copied, 0.00695137 seconds, 73.7 kB/s =================== The xfs_db: =================== # xfs_db -r -c "sb 0" -c p /dev/hdb cache_node_purge: refcount was 1, not zero (node=0x80ca410) xfs_db: cannot read root inode (22) cache_node_purge: refcount was 1, not zero (node=0x80da608) xfs_db: cannot read realtime bitmap inode (22) Segmentation fault =================== Distro: Debian etch uname -a : 2.6.18-5-686 xfsprogs version 2.9.4-2 (from Sid) You will find the chatlog attached. I just hope that it's recoverable even though I have backups that aren't exactly up to date. Thanks! Best regards, KwangErn
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