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PostPosted: Mon Jul 24, 2017 5:42 pm 
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Total Newbie

Joined: Mon Jul 24, 2017 9:53 am
Posts: 1
Hi,

Two parts to this note.

1. I called Buffalo Support to obtain the default settings for a RAID5 setup on the Buffalo Terastation TS-XL/5S only to be told they were not allowed to divulge these details, it was like being denied the default username/password combination on a new router! Then they stated they didn't know these details even though they are the manufacturer!

2. Does anyone know the default parameters, i.e. Standard Block Size - I think it is 512K, the parity, the parity offset, synchronous or asynchronous - just basically the parameters you would get if you just seeleced the defaults when creatign a RIAD5 array.

I simply need to rebuild a virtual array using R-Studio as my TeraStation died .... on so painful!

Many thanks for any help.


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PostPosted: Mon Jul 24, 2017 8:44 pm 
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Moderator

Joined: Mon Apr 26, 2010 10:24 am
Posts: 2692
I think, the device uses https://en.wikipedia.org/wiki/Mdadm

With mdadm you do not need any paramter to assemble an old raid.




maybe its the same as LS-QVL

Code:
root@QVL:~# cat /proc/mdstat
Personalities : [linear] [raid0] [raid1] [raid6] [raid5] [raid4]
md2 : active raid5 sda6[0] sdd6[3] sdc6[4] sdb6[1]
      11674308096 blocks super 1.2 level 5, 512k chunk, algorithm 2 [4/4] [UUUU]

Code:
root@QVL:~# mdadm -D /dev/md2
/dev/md2:
        Version : 1.2
  Creation Time : Mon Mar 27 17:50:03 2017
     Raid Level : raid5
     Array Size : 11674308096 (11133.49 GiB 11954.49 GB)
  Used Dev Size : 3891436032 (3711.16 GiB 3984.83 GB)
   Raid Devices : 4
  Total Devices : 4
    Persistence : Superblock is persistent

    Update Time : Mon Jul 24 21:41:25 2017
          State : clean
 Active Devices : 4
Working Devices : 4
 Failed Devices : 0
  Spare Devices : 0

         Layout : left-symmetric
     Chunk Size : 512K

           Name : QVL:2  (local to host QVL)
           UUID : fd95dfa2:d712a904:35e342f3:e8ca06d4
         Events : 8294

    Number   Major   Minor   RaidDevice State
       0       8        6        0      active sync   /dev/sda6
       1       8       22        1      active sync   /dev/sdb6
       4       8       38        2      active sync   /dev/sdc6
       3       8       54        3      active sync   /dev/sdd6

Code:
root@QVL:~# mount
...
/dev/md2 on /mnt/array1 type xfs (rw,noatime,attr2,sunit=1024,swidth=3072,usrquota,grpquota)


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