Package: mdadm Version: 3.3-2 Severity: normal Hi,
during a raid reshape, growing a raid5 from 5 to 6 disks, the onboard SATA controler must have crashed taking 2 disks offline. After reboot the raid did not come back (obviously) and I tried to assemble it manually: root@nas1:/root# mdadm -A /dev/md0 /dev/sdb /dev/sdc /dev/sdd /dev/sde /dev/sdf /dev/sda mdadm: too-old timestamp on backup-metadata on device-5 mdadm: If you think it is should be safe, try 'export MDADM_GROW_ALLOW_OLD=1' mdadm: /dev/md0 assembled from 4 drives - not enough to start the array. root@nas1:/root# MDADM_GROW_ALLOW_OLD=1 mdadm -A /dev/md0 /dev/sdb /dev/sdc /dev/sdd /dev/sde /dev/sdf /dev/sda mdadm: accepting backup with timestamp 1411799455 for array with timestamp 1411833334 mdadm: /dev/md0 assembled from 4 drives - not enough to start the array. root@nas1:/root# MDADM_GROW_ALLOW_OLD=1 mdadm -A --force /dev/md0 /dev/sdb /dev/sdc /dev/sdd /dev/sde /dev/sdf /dev/sda mdadm: accepting backup with timestamp 1411799455 for array with timestamp 1411833334 mdadm: /dev/md0 assembled from 4 drives - not enough to start the array. mdadm simply doesn't accept the 2 drives that went offline despite being told to ignore the timestamp difference. The raid wasn't being written to during reshape so it should be perfectly safe to resume. How do I get that raid started again so it can finish its reshape? MfG Goswin ### mdadm -E /dev/sdb ### /dev/sdb: Magic : a92b4efc Version : 1.2 Feature Map : 0x5 Array UUID : 3486be91:bc31bbb5:c10e4570:2530f4e7 Name : nas1:0 (local to host nas1) Creation Time : Tue Sep 9 04:01:34 2014 Raid Level : raid5 Raid Devices : 6 Avail Dev Size : 11721043120 (5589.03 GiB 6001.17 GB) Array Size : 29302607360 (27945.14 GiB 30005.87 GB) Used Dev Size : 11721042944 (5589.03 GiB 6001.17 GB) Data Offset : 2048 sectors Super Offset : 8 sectors Unused Space : before=1960 sectors, after=176 sectors State : clean Device UUID : cb8c6368:69fabeb3:30e368a0:bb3056f4 Internal Bitmap : 8 sectors from superblock Reshape pos'n : 5280002560 (5035.40 GiB 5406.72 GB) Delta Devices : 1 (5->6) Update Time : Sat Sep 27 17:55:34 2014 Bad Block Log : 512 entries available at offset 72 sectors Checksum : bddf8cdc - correct Events : 3922 Layout : left-symmetric Chunk Size : 512K Device Role : Active device 0 Array State : AAA..A ('A' == active, '.' == missing, 'R' == replacing) ### mdadm -E /dev/sdc ### /dev/sdc: Magic : a92b4efc Version : 1.2 Feature Map : 0x5 Array UUID : 3486be91:bc31bbb5:c10e4570:2530f4e7 Name : nas1:0 (local to host nas1) Creation Time : Tue Sep 9 04:01:34 2014 Raid Level : raid5 Raid Devices : 6 Avail Dev Size : 11721043120 (5589.03 GiB 6001.17 GB) Array Size : 29302607360 (27945.14 GiB 30005.87 GB) Used Dev Size : 11721042944 (5589.03 GiB 6001.17 GB) Data Offset : 2048 sectors Super Offset : 8 sectors Unused Space : before=1960 sectors, after=176 sectors State : clean Device UUID : 8d794606:81e23fe3:d75bf196:a32e9b79 Internal Bitmap : 8 sectors from superblock Reshape pos'n : 5280002560 (5035.40 GiB 5406.72 GB) Delta Devices : 1 (5->6) Update Time : Sat Sep 27 17:55:34 2014 Bad Block Log : 512 entries available at offset 72 sectors Checksum : 710d846 - correct Events : 3922 Layout : left-symmetric Chunk Size : 512K Device Role : Active device 1 Array State : AAA..A ('A' == active, '.' == missing, 'R' == replacing) ### mdadm -E /dev/sdd ### /dev/sdd: Magic : a92b4efc Version : 1.2 Feature Map : 0x5 Array UUID : 3486be91:bc31bbb5:c10e4570:2530f4e7 Name : nas1:0 (local to host nas1) Creation Time : Tue Sep 9 04:01:34 2014 Raid Level : raid5 Raid Devices : 6 Avail Dev Size : 11721043120 (5589.03 GiB 6001.17 GB) Array Size : 29302607360 (27945.14 GiB 30005.87 GB) Used Dev Size : 11721042944 (5589.03 GiB 6001.17 GB) Data Offset : 2048 sectors Super Offset : 8 sectors Unused Space : before=1960 sectors, after=176 sectors State : clean Device UUID : 2391b641:fc3ded21:d038ce0d:24b56a5c Internal Bitmap : 8 sectors from superblock Reshape pos'n : 5280002560 (5035.40 GiB 5406.72 GB) Delta Devices : 1 (5->6) Update Time : Sat Sep 27 17:55:34 2014 Bad Block Log : 512 entries available at offset 72 sectors Checksum : dadaaed0 - correct Events : 3922 Layout : left-symmetric Chunk Size : 512K Device Role : Active device 2 Array State : AAA..A ('A' == active, '.' == missing, 'R' == replacing) ### mdadm -E /dev/sde ### /dev/sde: Magic : a92b4efc Version : 1.2 Feature Map : 0x5 Array UUID : 3486be91:bc31bbb5:c10e4570:2530f4e7 Name : nas1:0 (local to host nas1) Creation Time : Tue Sep 9 04:01:34 2014 Raid Level : raid5 Raid Devices : 6 Avail Dev Size : 11721043120 (5589.03 GiB 6001.17 GB) Array Size : 29302607360 (27945.14 GiB 30005.87 GB) Used Dev Size : 11721042944 (5589.03 GiB 6001.17 GB) Data Offset : 2048 sectors Super Offset : 8 sectors Unused Space : before=1960 sectors, after=176 sectors State : clean Device UUID : 9d54522d:b1881b31:9cfa1e74:4c41f61e Internal Bitmap : 8 sectors from superblock Reshape pos'n : 5280002560 (5035.40 GiB 5406.72 GB) Delta Devices : 1 (5->6) Update Time : Sat Sep 27 17:54:01 2014 Bad Block Log : 512 entries available at offset 72 sectors Checksum : fe8c0a93 - correct Events : 3920 Layout : left-symmetric Chunk Size : 512K Device Role : Active device 3 Array State : AAAAAA ('A' == active, '.' == missing, 'R' == replacing) ### mdadm -E /dev/sdf ### /dev/sdf: Magic : a92b4efc Version : 1.2 Feature Map : 0x5 Array UUID : 3486be91:bc31bbb5:c10e4570:2530f4e7 Name : nas1:0 (local to host nas1) Creation Time : Tue Sep 9 04:01:34 2014 Raid Level : raid5 Raid Devices : 6 Avail Dev Size : 11721043120 (5589.03 GiB 6001.17 GB) Array Size : 29302607360 (27945.14 GiB 30005.87 GB) Used Dev Size : 11721042944 (5589.03 GiB 6001.17 GB) Data Offset : 2048 sectors Super Offset : 8 sectors Unused Space : before=1960 sectors, after=176 sectors State : clean Device UUID : 2dc00648:38ee9d56:eaaee1ed:ba9e0134 Internal Bitmap : 8 sectors from superblock Reshape pos'n : 5280002560 (5035.40 GiB 5406.72 GB) Delta Devices : 1 (5->6) Update Time : Sat Sep 27 17:54:01 2014 Bad Block Log : 512 entries available at offset 72 sectors Checksum : cd90ed69 - correct Events : 3920 Layout : left-symmetric Chunk Size : 512K Device Role : Active device 4 Array State : AAAAAA ('A' == active, '.' == missing, 'R' == replacing) ### mdadm -E /dev/sda ### /dev/sda: Magic : a92b4efc Version : 1.2 Feature Map : 0x5 Array UUID : 3486be91:bc31bbb5:c10e4570:2530f4e7 Name : nas1:0 (local to host nas1) Creation Time : Tue Sep 9 04:01:34 2014 Raid Level : raid5 Raid Devices : 6 Avail Dev Size : 11721043120 (5589.03 GiB 6001.17 GB) Array Size : 29302607360 (27945.14 GiB 30005.87 GB) Used Dev Size : 11721042944 (5589.03 GiB 6001.17 GB) Data Offset : 2048 sectors Super Offset : 8 sectors Unused Space : before=1960 sectors, after=176 sectors State : clean Device UUID : 08ecb2a1:cd975fb3:8ef0d37a:132b3866 Internal Bitmap : 8 sectors from superblock Reshape pos'n : 5280002560 (5035.40 GiB 5406.72 GB) Delta Devices : 1 (5->6) Update Time : Sat Sep 27 17:55:34 2014 Bad Block Log : 512 entries available at offset 72 sectors Checksum : 431c9139 - correct Events : 3922 Layout : left-symmetric Chunk Size : 512K Device Role : Active device 5 Array State : AAA..A ('A' == active, '.' == missing, 'R' == replacing) -- Package-specific info: IMPORTANT: please do not forget to include all relevant system information with this bug report. You could run /usr/share/bug/mdadm/script 3>&1 as root and attach or include the output. -- System Information: Debian Release: jessie/sid APT prefers unstable APT policy: (500, 'unstable'), (1, 'experimental') Architecture: amd64 (x86_64) Foreign Architectures: i386 Kernel: Linux 3.14-1-amd64 (SMP w/4 CPU cores) Locale: LANG=C, LC_CTYPE=de_DE (charmap=ISO-8859-1) Shell: /bin/sh linked to /bin/dash Versions of packages mdadm depends on: ii debconf 1.5.53 ii initscripts 2.88dsf-53 ii libc6 2.19-1 ii lsb-base 4.1+Debian12 ii makedev 2.3.1-93 ii udev 204-10 Versions of packages mdadm recommends: ii exim4-daemon-heavy [mail-transport-agent] 4.82-8 ii module-init-tools 16-2 mdadm suggests no packages. -- debconf information excluded -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org