Missing Space

Topics pertaining to volume setup, boot/shutdown, initialization, DSM update, HDD migration.
Forum rules
1) This is a user forum for Synology users to share experience/help out each other: if you need direct assistance from the Synology technical support team, please use the following form:
https://myds.synology.com/support/suppo ... p?lang=enu
2) To avoid putting users' DiskStation at risk, please don't paste links to any patches provided by our Support team as we will systematically remove them. Our Support team will provide the correct patch for your DiskStation model.

Missing Space

Postby goubda » Mon Aug 05, 2013 9:13 am

Hi

I have a DS2413+. Ever since I have had it, I seem to be missing some space. I have 6 x 2TB drives and 4 x 500GB Drives.

In theory once I have lost raid and some small overhead for the OS, I believe I should have about 10.4TB of usable space, however I only have 9.3TB so I'm missing about 1.1 TB.

So recently I did some digging and notices that there is a Raid 5 group MD2 made up of 500GB disks and 500GB off the 2TB drives. There are 10 disks in the Raid group, however 3 of them appear to be marked as spare. Missing space!!

If I fail a drive by pulling it out, immediately it uses one of the spares to rebuild that raid group and fails the others raid groups. Re-adding the Disk repairs the other raid groups and re-adds the spare to MD2

Does anyone know why this may be the case and if there is a way to activate the spares.
Maybe - mdadm --grow /dev/md2 -n 10

FYI - /proc/mdstat results

Personalities : [linear] [raid0] [raid1] [raid10] [raid6] [raid5] [raid4]
md3 : active raid5 sdj6[7] sdb6[3] sdc6[4] sdd6[5] sda6[6] sde6[1]
7325593920 blocks super 1.2 level 5, 64k chunk, algorithm 2 [6/6] [UUUUUU]

md2 : active raid5 sdf5[12](S) sdh5[0] sdj5[11] sdb5[7](S) sda5[10](S) sdc5[8] sde5[4] sdd5[9] sdi5[3] sdg5[1]
2901909888 blocks super 1.2 level 5, 64k chunk, algorithm 2 [7/7] [UUUUUUU]
bitmap: 0/4 pages [0KB], 65536KB chunk

md1 : active raid1 sdf2[3] sda2[9] sdb2[7] sdc2[8] sdd2[6] sde2[5] sdg2[0] sdh2[1] sdi2[4] sdj2[2]
2097088 blocks [12/10] [UUUUUUUUUU__]
bitmap: 1/1 pages [4KB], 65536KB chunk

md0 : active raid1 sdf1[3] sda1[9] sdb1[7] sdc1[8] sdd1[6] sde1[5] sdg1[0] sdh1[1] sdi1[4] sdj1[2]
2490176 blocks [12/10] [UUUUUUUUUU__]
bitmap: 1/1 pages [4KB], 65536KB chunk

unused devices: <none>
goubda
I'm New!
I'm New!
 
Posts: 2
Joined: Thu Mar 28, 2013 12:17 pm

Return to Installation, Configuration, Migration, Expansion

Who is online

Users browsing this forum: No registered users and 6 guests