What does "State : dirty" mean?

[Simon Frettloeh <sifr@xxxxxxxxxxxxxxxxxxxxx>]

Hi!

We had several RAID-Problems in last time and now are trying to monitor 
those raids better in future. But we're wondering about the output of 
"mdadm --detail" (see below).
What does the state "dirty" mean? What other states are possible? I've 
tried to search the net for an answer but wasn't able to find something 
about it.

==snip==
[root@XXX root]# mdadm --detail /dev/md0
/dev/md0:
        Version : 00.90.00
  Creation Time : Thu Dec 13 15:36:07 2001
     Raid Level : raid0
     Array Size : 20480000 (19.53 GiB 20.102 GB)
   Raid Devices : 4
  Total Devices : 4
Preferred Minor : 0
    Persistence : Superblock is persistent

    Update Time : Tue Aug 24 13:57:41 2004
          State : dirty, no-errors
 Active Devices : 4
Working Devices : 4
 Failed Devices : 0
  Spare Devices : 0

     Chunk Size : 128K

    Number   Major   Minor   RaidDevice State
       0       3        1        0      active sync   /dev/hda1
       1       3       65        1      active sync   /dev/hdb1
       2      22        1        2      active sync   /dev/hdc1
       3      22       65        3      active sync   /dev/hdd1
           UUID : d02faae1:77fbad31:a47bb162:75f1003a
==snap==

Best regards,
Simon Frettloeh

--
Simon Frettloeh
Institute AIFB
(Applied Computer Science and Formal Description Methods)
University of Karlsruhe
Engler Str. 11 - 76128 Karlsruhe - Germany

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