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I have a (complicated) RAID hard drive issue:

I have a Synology DS413j with 4 hds, hd 3 failed so I decided to replace them. The official support article says to replace them one by one, and being the dumb person I am I replaced hard drive 1. I then decided to transfer the files onto a external hard drive then create a new volume with the new hds and then transfer the files back on, but then hd 3 kept on crashing the entire thing, and with hard drive 1 not being initialized and SHR's one drive fault tolerance, I couldn't do that successfully without multiple attempts. I now pulled all 4 hds and decided to create a new volume with the new drives then take the 4 old hds and transfer the data that way. When I put the SHR formatted hds on gparted it looks like this:

/dev/sdc1 - Linux-Raid-Member (2,5GB)

/dev/sdc2 - Linux-Raid-Member (2,5GB)

Unallocated Space

/dev/sdc3 - Extended (2,0TB)

Unallocated Space
/dev/sdc5 - Linux-Raid-Member (2,0TB)
Unallocated Space

fdisk -l says:

Disk /dev/sde: 1.8 TiB, 2000398934016 bytes, 3907029168 sectors

Units: sectors of 1 * 512 = 512 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disklabel type: dos

Disk identifier: 0x48da305a

Device Boot Start End Sectors Size Id Type

/dev/sde1 256 4980735 4980480 2.4G fd Linux raid autodetect

/dev/sde2 4980736 9175039 4194304 2G fd Linux raid autodetect

/dev/sde3 9437184 3907015007 3897577824 1.8T f W95 Ext'd (LBA)

/dev/sde5 9453280 3907015007 3897561728 1.8T fd Linux raid autodetect

sdc1 & sdc2 are probably the system partitions (which have been corrupted on 2 of the hds), sdc5 is the data.

Any ideas on how to tackle this?

  • "The official support article says to replace them one by one" -- I expect that the official support article expects that you know you only need to replace the failing drive. Additionally the output of fdisk -l is probably more useful than what you've pasted. – wurtel Jun 22 '18 at 10:09
  • I wanted to replace all the drives, so according to the support article I need to replace them one by one. Will add fdisk -l soon. – laol12 Jun 22 '18 at 16:58

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