Пересчёт RAID 6

(parted) select /dev/md0p1
Using /dev/md0p1
(parted) resize

WARNING: you are attempting to use parted to operate on (resize) a file system. parted's file system manipulation code is not as robust as what you'll find in dedicated, file-system-specific packages like e2fsprogs. We recommend you use parted only to manipulate partition tables, whenever possible. Support for performing most operations on most types of file systems will be removed in an upcoming release. Partition number?

/dev/md0:
        Version : 1.2
  Creation Time : Mon Nov 14 10:50:56 2011
     Raid Level : raid6
     Array Size : 9767552000 (9315.06 GiB 10001.97 GB)
  Used Dev Size : 1953510400 (1863.01 GiB 2000.39 GB)
   Raid Devices : 7
  Total Devices : 7
    Persistence : Superblock is persistent
    Update Time : Sat Nov 24 15:10:09 2012
          State : clean
 Active Devices : 7
Working Devices : 7
 Failed Devices : 0
  Spare Devices : 0
         Layout : left-symmetric
     Chunk Size : 512K
           Name : tonas:0  (local to host tonas)
           UUID : 287f64dd:11d67ba0:6387d98a:671871f1
         Events : 170370
    Number   Major   Minor   RaidDevice State
       0       8       81        0      active sync   /dev/sdf1
       1       8       65        1      active sync   /dev/sde1
       2       8       97        2      active sync   /dev/sdg1
       3       8       17        3      active sync   /dev/sdb1
       4       8       33        4      active sync   /dev/sdc1
       7       8       49        5      active sync   /dev/sdd1
       8       8      113        6      active sync   /dev/sdh1

fdisk -l
Disk /dev/sda: 40.0 GB, 40019582464 bytes
255 heads, 63 sectors/track, 4865 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0002a323
   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1        4663    37446656   83  Linux
/dev/sda2            4663        4866     1632257    5  Extended
/dev/sda5            4663        4866     1632256   82  Linux swap / Solaris
Disk /dev/sdb: 2000.4 GB, 2000398934016 bytes
255 heads, 63 sectors/track, 243201 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0002a726
   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1               1      243201  1953512001   fd  Linux raid autodetect
Disk /dev/sdd: 2000.4 GB, 2000398934016 bytes
255 heads, 63 sectors/track, 243201 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000498f3
   Device Boot      Start         End      Blocks   Id  System
/dev/sdd1               1      243201  1953512001   fd  Linux raid autodetect
Disk /dev/sde: 2000.4 GB, 2000398934016 bytes
255 heads, 63 sectors/track, 243201 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00038618
   Device Boot      Start         End      Blocks   Id  System
/dev/sde1               1      243201  1953512001   fd  Linux raid autodetect
Disk /dev/sdf: 2000.4 GB, 2000398934016 bytes
255 heads, 63 sectors/track, 243201 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x80c604ad
   Device Boot      Start         End      Blocks   Id  System
/dev/sdf1               1      243201  1953512001   fd  Linux raid autodetect
Partition 1 does not start on physical sector boundary.
Disk /dev/sdg: 2000.4 GB, 2000398934016 bytes
255 heads, 63 sectors/track, 243201 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000ec176
   Device Boot      Start         End      Blocks   Id  System
/dev/sdg1               1      243201  1953512001   fd  Linux raid autodetect
Disk /dev/sdh: 2000.4 GB, 2000398934016 bytes
255 heads, 63 sectors/track, 243201 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x52c348b1
   Device Boot      Start         End      Blocks   Id  System
/dev/sdh1               1      243201  1953512001   fd  Linux raid autodetect
Partition 1 does not start on physical sector boundary.
Disk /dev/sdc: 2000.4 GB, 2000398934016 bytes
255 heads, 63 sectors/track, 243201 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0xae2ddf69

mdadm --detail /dev/md0
mdadm: md device /dev/md0 does not appear to be active

mdadm --assemble /dev/md0 /dev/sdb1 /dev/sde1 /dev/sdd1 /dev/sdc1 /dev/sdg1
mdadm: cannot open device /dev/sdb1: Device or resource busy
mdadm: /dev/sdb1 has no superblock - assembly aborted

root@tonas:/home/sshuser# cat /proc/mdstat
Personalities : [raid6] [raid5] [raid4] 
md0 : active raid6 sdb1[0] sde1[4] sdd1[3] sdc1[2] sdg1[1]
      9767552000 blocks super 1.2 level 6, 512k chunk, algorithm 2 [7/5] [UUUUU__]
      
unused devices: <none>
root@tonas:/home/sshuser# mdadm --detail /dev/md0
/dev/md0:
        Version : 1.2
  Creation Time : Mon Nov 14 10:50:56 2011
     Raid Level : raid6
     Array Size : 9767552000 (9315.06 GiB 10001.97 GB)
  Used Dev Size : 1953510400 (1863.01 GiB 2000.39 GB)
   Raid Devices : 7
  Total Devices : 5
    Persistence : Superblock is persistent
    Update Time : Sat Nov 24 22:00:03 2012
          State : clean, degraded
 Active Devices : 5
Working Devices : 5
 Failed Devices : 0
  Spare Devices : 0
         Layout : left-symmetric
     Chunk Size : 512K
           Name : tonas:0  (local to host tonas)
           UUID : 287f64dd:11d67ba0:6387d98a:671871f1
         Events : 172904
    Number   Major   Minor   RaidDevice State
       0       8       17        0      active sync   /dev/sdb1
       1       8       97        1      active sync   /dev/sdg1
       2       8       33        2      active sync   /dev/sdc1
       3       8       49        3      active sync   /dev/sdd1
       4       8       65        4      active sync   /dev/sde1
       5       0        0        5      removed
       6       0        0        6      removed
root@tonas:/home/sshuser# mdadm --detail /dev/md0p1
/dev/md0p1:
        Version : 1.2
  Creation Time : Mon Nov 14 10:50:56 2011
     Raid Level : raid6
     Array Size : 5860531166 (5589.04 GiB 6001.18 GB)
  Used Dev Size : 1953510400 (1863.01 GiB 2000.39 GB)
   Raid Devices : 7
  Total Devices : 5
    Persistence : Superblock is persistent
    Update Time : Sat Nov 24 22:00:25 2012
          State : clean, degraded
 Active Devices : 5
Working Devices : 5
 Failed Devices : 0
  Spare Devices : 0
         Layout : left-symmetric
     Chunk Size : 512K
           Name : tonas:0  (local to host tonas)
           UUID : 287f64dd:11d67ba0:6387d98a:671871f1
         Events : 172918
    Number   Major   Minor   RaidDevice State
       0       8       17        0      active sync   /dev/sdb1
       1       8       97        1      active sync   /dev/sdg1
       2       8       33        2      active sync   /dev/sdc1
       3       8       49        3      active sync   /dev/sdd1
       4       8       65        4      active sync   /dev/sde1
       5       0        0        5      removed
       6       0        0        6      removed
Using /dev/md0
(parted) print                                                            
Model: Linux Software RAID Array (md)
Disk /dev/md0: 10,0TB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Number  Start   End     Size    File system  Name  Flags
 1      17,4kB  6001GB  6001GB  ext4         raid

 resize2fs /dev/md0p1
resize2fs 1.41.12 (17-May-2010)
The filesystem is already 1465132791 blocks long.  Nothing to do!

# parted
GNU Parted 2.3
Using /dev/sda
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) select /dev/md0p1
Using /dev/md0p1
(parted) print
Model: Unknown (unknown)
Disk /dev/md0p1: 6001GB
Sector size (logical/physical): 512B/512B
Partition Table: loop
Number  Start  End     Size    File system  Flags
 1      0,00B  6001GB  6001GB  ext4

(parted) select /dev/md0
Using /dev/md0
(parted) print
Model: Linux Software RAID Array (md)
Disk /dev/md0: 10,0TB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Number  Start   End     Size    File system  Name  Flags
 1      17,4kB  6001GB  6001GB  ext4         raid

fsck.ext4: No such file or directory while trying to open /dev/md0p1
/dev/md0p1: 
The superblock could not be read or does not describe a correct ext2
filesystem.  If the device is valid and it really contains an ext2
filesystem (and not swap or ufs or something else), then the superblock
is corrupt, and you might try running e2fsck with an alternate superblock:
    e2fsck -b 8193 <device>
fsck died with exit status 8

give root password for maintenance
(or type Control D to continue)