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- root@sysresccd /root % cat /proc/mdstat
- Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]
- md1 : inactive sdb2[2](S) sda2[4](S) sdd2[3](S) sdc2[1](S)
- 3905625088 blocks super 1.1
- md0 : active raid1 sdc1[1] sdd1[3] sdb1[2]
- 255936 blocks super 1.0 [4/3] [_UUU]
- unused devices: <none>
- root@sysresccd /root % dmesg | grep raid
- [ 10.228754] md: raid0 personality registered for level 0
- [ 10.230465] md: raid1 personality registered for level 1
- [ 10.255010] raid6: int64x1 2039 MB/s
- [ 10.272036] raid6: int64x2 2265 MB/s
- [ 10.289035] raid6: int64x4 1949 MB/s
- [ 10.306028] raid6: int64x8 1425 MB/s
- [ 10.323032] raid6: sse2x1 3218 MB/s
- [ 10.340017] raid6: sse2x2 4085 MB/s
- [ 10.357021] raid6: sse2x4 6691 MB/s
- [ 10.357022] raid6: using algorithm sse2x4 (6691 MB/s)
- [ 10.358839] md: raid6 personality registered for level 6
- [ 10.358846] md: raid5 personality registered for level 5
- [ 10.358847] md: raid4 personality registered for level 4
- [ 10.363035] md: raid10 personality registered for level 10
- [ 10.750614] md/raid1:md0: active with 3 out of 4 mirrors
- [ 44.530653] md: invalid raid superblock magic on sda1
- root@sysresccd /root %
- root@sysresccd /root % dmesg | grep md
- [ 0.000000] Linux version 3.2.28-std300-amd64 (root@catalyst) (gcc version 4.4.7 (Gentoo 4.4.7 p1.0, pie-0.4.5) ) #2 SMP Tue Aug 21 18:35:38 UTC 2012
- [ 2.568955] usb usb1: Manufacturer: Linux 3.2.28-std300-amd64 ehci_hcd
- [ 2.584953] usb usb2: Manufacturer: Linux 3.2.28-std300-amd64 ehci_hcd
- [ 2.588163] usb usb3: Manufacturer: Linux 3.2.28-std300-amd64 uhci_hcd
- [ 2.590887] usb usb4: Manufacturer: Linux 3.2.28-std300-amd64 uhci_hcd
- [ 2.597811] usb usb5: Manufacturer: Linux 3.2.28-std300-amd64 uhci_hcd
- [ 2.600571] usb usb6: Manufacturer: Linux 3.2.28-std300-amd64 uhci_hcd
- [ 10.225876] md: linear personality registered for level -1
- [ 10.227323] md: multipath personality registered for level -4
- [ 10.228754] md: raid0 personality registered for level 0
- [ 10.230465] md: raid1 personality registered for level 1
- [ 10.358839] md: raid6 personality registered for level 6
- [ 10.358846] md: raid5 personality registered for level 5
- [ 10.358847] md: raid4 personality registered for level 4
- [ 10.363035] md: raid10 personality registered for level 10
- [ 10.733472] md: md0 stopped.
- [ 10.734535] md: bind<sda1>
- [ 10.734667] md: bind<sdb1>
- [ 10.734803] md: bind<sdd1>
- [ 10.734942] md: bind<sdc1>
- [ 10.734958] md: kicking non-fresh sda1 from array!
- [ 10.734963] md: unbind<sda1>
- [ 10.749093] md: export_rdev(sda1)
- [ 10.750614] md/raid1:md0: active with 3 out of 4 mirrors
- [ 10.750641] md0: detected capacity change from 0 to 262078464
- [ 10.751856] md0: unknown partition table
- [ 10.992977] md: md1 stopped.
- [ 10.994538] md: bind<sdc2>
- [ 10.994672] md: bind<sdd2>
- [ 10.994820] md: bind<sda2>
- [ 10.994982] md: bind<sdb2>
- [ 44.523203] md: Autodetecting RAID arrays.
- [ 44.530653] md: invalid raid superblock magic on sda1
- [ 44.530656] md: sda1 does not have a valid v0.90 superblock, not importing!
- [ 44.530701] md: could not open unknown-block(8,2).
- [ 44.530711] md: could not open unknown-block(8,17).
- [ 44.530714] md: could not open unknown-block(8,18).
- [ 44.530718] md: could not open unknown-block(8,33).
- [ 44.530722] md: could not open unknown-block(8,34).
- [ 44.530726] md: could not open unknown-block(8,49).
- [ 44.530729] md: could not open unknown-block(8,50).
- [ 44.530731] md: Scanned 8 and added 0 devices.
- [ 44.530732] md: autorun ...
- [ 44.530733] md: ... autorun DONE.
- root@sysresccd /root % mdadm --assemble --scan -v
- mdadm: looking for devices for further assembly
- mdadm: no recogniseable superblock on /dev/md/0
- mdadm: cannot open device /dev/sr0: No medium found
- mdadm: cannot open device /dev/sdd2: Device or resource busy
- mdadm: cannot open device /dev/sdd1: Device or resource busy
- mdadm: cannot open device /dev/sdd: Device or resource busy
- mdadm: cannot open device /dev/sdc2: Device or resource busy
- mdadm: cannot open device /dev/sdc1: Device or resource busy
- mdadm: cannot open device /dev/sdc: Device or resource busy
- mdadm: cannot open device /dev/sdb2: Device or resource busy
- mdadm: cannot open device /dev/sdb1: Device or resource busy
- mdadm: cannot open device /dev/sdb: Device or resource busy
- mdadm: cannot open device /dev/sda2: Device or resource busy
- mdadm: cannot open device /dev/sda: Device or resource busy
- mdadm: cannot open device /dev/loop0: Device or resource busy
- mdadm: /dev/sda1 is identified as a member of /dev/md/localhost.localdomain:0, slot 0.
- mdadm: no uptodate device for slot 1 of /dev/md/localhost.localdomain:0
- mdadm: no uptodate device for slot 2 of /dev/md/localhost.localdomain:0
- mdadm: no uptodate device for slot 3 of /dev/md/localhost.localdomain:0
- mdadm: added /dev/sda1 to /dev/md/localhost.localdomain:0 as 0
- mdadm: /dev/md/localhost.localdomain:0 has been started with 1 drive (out of 4).
- mdadm: looking for devices for further assembly
- mdadm: looking for devices for further assembly
- mdadm: no recogniseable superblock on /dev/md/0
- mdadm: no recogniseable superblock on /dev/md/0
- mdadm: cannot open device /dev/sr0: No medium found
- mdadm: cannot open device /dev/sdd2: Device or resource busy
- mdadm: cannot open device /dev/sdd1: Device or resource busy
- mdadm: cannot open device /dev/sdd: Device or resource busy
- mdadm: cannot open device /dev/sdc2: Device or resource busy
- mdadm: cannot open device /dev/sdc1: Device or resource busy
- mdadm: cannot open device /dev/sdc: Device or resource busy
- mdadm: cannot open device /dev/sdb2: Device or resource busy
- mdadm: cannot open device /dev/sdb1: Device or resource busy
- mdadm: cannot open device /dev/sdb: Device or resource busy
- mdadm: cannot open device /dev/sda2: Device or resource busy
- mdadm: cannot open device /dev/sda1: Device or resource busy
- mdadm: cannot open device /dev/sda: Device or resource busy
- mdadm: cannot open device /dev/loop0: Device or resource busy
- root@sysresccd /root % mdadm --examine /dev/sd[abcd]2
- /dev/sda2:
- Magic : a92b4efc
- Version : 1.1
- Feature Map : 0x1
- Array UUID : 160f35df:54055a13:77806c03:b12aea12
- Name : localhost.localdomain:1
- Creation Time : Thu Sep 12 02:37:10 2013
- Raid Level : raid10
- Raid Devices : 4
- Avail Dev Size : 1953007616 (931.27 GiB 999.94 GB)
- Array Size : 3905492992 (1862.28 GiB 1999.61 GB)
- Used Dev Size : 1952746496 (931.14 GiB 999.81 GB)
- Data Offset : 2048 sectors
- Super Offset : 0 sectors
- State : clean
- Device UUID : ae4e65b3:95c4da54:d295cf4c:de32e851
- Internal Bitmap : 8 sectors from superblock
- Update Time : Mon Oct 21 02:21:07 2013
- Checksum : f86dd3de - correct
- Events : 0
- Layout : near=2
- Chunk Size : 512K
- Device Role : spare
- Array State : ..AA ('A' == active, '.' == missing)
- /dev/sdb2:
- Magic : a92b4efc
- Version : 1.1
- Feature Map : 0x1
- Array UUID : 160f35df:54055a13:77806c03:b12aea12
- Name : localhost.localdomain:1
- Creation Time : Thu Sep 12 02:37:10 2013
- Raid Level : raid10
- Raid Devices : 4
- Avail Dev Size : 1952747520 (931.14 GiB 999.81 GB)
- Array Size : 3905492992 (1862.28 GiB 1999.61 GB)
- Used Dev Size : 1952746496 (931.14 GiB 999.81 GB)
- Data Offset : 262144 sectors
- Super Offset : 0 sectors
- State : clean
- Device UUID : 9fdb73ad:ab3b67ef:62cf56cb:48a7cbae
- Internal Bitmap : 8 sectors from superblock
- Update Time : Mon Oct 21 02:21:07 2013
- Checksum : 6873c900 - correct
- Events : 17186
- Layout : near=2
- Chunk Size : 512K
- Device Role : Active device 2
- Array State : ..AA ('A' == active, '.' == missing)
- /dev/sdc2:
- Magic : a92b4efc
- Version : 1.1
- Feature Map : 0x1
- Array UUID : 160f35df:54055a13:77806c03:b12aea12
- Name : localhost.localdomain:1
- Creation Time : Thu Sep 12 02:37:10 2013
- Raid Level : raid10
- Raid Devices : 4
- Avail Dev Size : 1952747520 (931.14 GiB 999.81 GB)
- Array Size : 3905492992 (1862.28 GiB 1999.61 GB)
- Used Dev Size : 1952746496 (931.14 GiB 999.81 GB)
- Data Offset : 262144 sectors
- Super Offset : 0 sectors
- State : clean
- Device UUID : 5d5f5fbf:4b2140f9:3f622131:79f52f32
- Internal Bitmap : 8 sectors from superblock
- Update Time : Mon Oct 21 02:08:42 2013
- Checksum : 6d691077 - correct
- Events : 17175
- Layout : near=2
- Chunk Size : 512K
- Device Role : Active device 1
- Array State : AAAA ('A' == active, '.' == missing)
- /dev/sdd2:
- Magic : a92b4efc
- Version : 1.1
- Feature Map : 0x1
- Array UUID : 160f35df:54055a13:77806c03:b12aea12
- Name : localhost.localdomain:1
- Creation Time : Thu Sep 12 02:37:10 2013
- Raid Level : raid10
- Raid Devices : 4
- Avail Dev Size : 1952747520 (931.14 GiB 999.81 GB)
- Array Size : 3905492992 (1862.28 GiB 1999.61 GB)
- Used Dev Size : 1952746496 (931.14 GiB 999.81 GB)
- Data Offset : 262144 sectors
- Super Offset : 0 sectors
- State : clean
- Device UUID : 57e6e332:c199a57b:94846dd1:5551635d
- Internal Bitmap : 8 sectors from superblock
- Update Time : Mon Oct 21 02:21:07 2013
- Checksum : 2ed0910d - correct
- Events : 17186
- Layout : near=2
- Chunk Size : 512K
- Device Role : Active device 3
- Array State : ..AA ('A' == active, '.' == missing)
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