Hi all,
I've a device that's part of an MD array:
fdisk
Disk /dev/sdg: 3000.6 GB, 3000592982016 bytes
255 heads, 63 sectors/track, 364801 cylinders, total 5860533168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x00000000
$ sudo mdadm -E /dev/sdg
/dev/sdg:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 0ad2603e:e43283ee:02180773:98e716ef
Name : ion:md0 (local to host ion)
Creation Time : Tue Feb 5 17:33:27 2013
Raid Level : raid6
Raid Devices : 6
Avail Dev Size : 5860271024 (2794.40 GiB 3000.46 GB)
Array Size : 7813531648 (7451.56 GiB 8001.06 GB)
Used Dev Size : 3906765824 (1862.89 GiB 2000.26 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
State : clean
Device UUID : 39c0b717:a9ca1dd7:bcba618f:caed0879
Update Time : Fri Jan 10 17:28:31 2014
Checksum : 53ea0170 - correct
Events : 2668
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 4
Array State : AAAAAA ('A' == active, '.' == missing)
As you can see, Used Dev Size is lower than Avail Dev Size. Can I use
the unallocated space by MD for storage somehow? As the devices in the
array are used fully (no partitions) I guess not, but perhaps there is
a way.
Regards,
Mathias
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