I have an Orico (3559SUSJ3) external 5 bay
hard disk drive enclosure attached via
USB to my desktop computer.
It holds 5 * 4 TB disks in raid5 and
has functioned for a couple of years.
Then the power supply (or fan
or some internal component of the chasis)
failed and -- from one boot to the next --
the chasis is DOA, i.e. it does not even power
on the disks.
When last used, the drives were all active and
in good shape; I copy below the output of the
mdadm --detail list
just a short time before the failure.
My main question is whether inserting
the 5 disks into another JBOD chasis
is likely to work? In particular is
mdadm "smart enough" to find all
the components and/or do I need to do
something to help it along? In fact,
our IT person has suggested that the
data may well be lost.
Details:
raid5 (no spares)
20 TB
XFS filesystem
Debian 3.16.0-4-amd64
Also, since I first used the JBOD with software
raid I came to realize that the usb connection
is not a good choice (though I have never had
problems). What sort of connection (at the low
price end of the market for HDD enclosures)
would be better? eSata or something else?
Many thanks for answers/suggestions.
David
-----------------------------------------------------------
OUTPUT of mdadm --detail list
/dev/sdd1:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : 954b2546:5c467e9c:a4eb74e3:27dad837
Name : impala:0
Creation Time : Fri May 22 15:32:31 2015
Raid Level : raid5
Raid Devices : 5
Avail Dev Size : 7813771264 (3725.90 GiB 4000.65 GB)
Array Size : 15627542528 (14903.59 GiB 16002.60 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262056 sectors, after=0 sectors
State : clean
Device UUID : f0cda836:8c1c28d1:53710d20:db8d088a
Internal Bitmap : 8 sectors from superblock
Update Time : Sat Sep 2 18:54:20 2017
Bad Block Log : 512 entries available at offset 72 sectors
Checksum : 3d0d8085 - correct
Events : 197036
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 4
Array State : AAAAA ('A' == active, '.' == missing, 'R' ==
replacing)
/dev/sde1:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : 954b2546:5c467e9c:a4eb74e3:27dad837
Name : impala:0
Creation Time : Fri May 22 15:32:31 2015
Raid Level : raid5
Raid Devices : 5
Avail Dev Size : 7813771264 (3725.90 GiB 4000.65 GB)
Array Size : 15627542528 (14903.59 GiB 16002.60 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262056 sectors, after=0 sectors
State : clean
Device UUID : 2e1a57ff:f892fb23:1f698390:53dd98e3
Internal Bitmap : 8 sectors from superblock
Update Time : Sat Sep 2 18:54:20 2017
Bad Block Log : 512 entries available at offset 72 sectors
Checksum : 22958a72 - correct
Events : 197036
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 3
Array State : AAAAA ('A' == active, '.' == missing, 'R' ==
replacing)
/dev/sdf1:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : 954b2546:5c467e9c:a4eb74e3:27dad837
Name : impala:0
Creation Time : Fri May 22 15:32:31 2015
Raid Level : raid5
Raid Devices : 5
Avail Dev Size : 7813771264 (3725.90 GiB 4000.65 GB)
Array Size : 15627542528 (14903.59 GiB 16002.60 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262056 sectors, after=0 sectors
State : clean
Device UUID : 3be7bbb4:4e5f07e3:f78f3c31:5bd6df6b
Internal Bitmap : 8 sectors from superblock
Update Time : Sat Sep 2 18:54:20 2017
Bad Block Log : 512 entries available at offset 72 sectors
Checksum : c00643b3 - correct
Events : 197036
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 2
Array State : AAAAA ('A' == active, '.' == missing, 'R' ==
replacing)
/dev/sdg1:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : 954b2546:5c467e9c:a4eb74e3:27dad837
Name : impala:0
Creation Time : Fri May 22 15:32:31 2015
Raid Level : raid5
Raid Devices : 5
Avail Dev Size : 7813771264 (3725.90 GiB 4000.65 GB)
Array Size : 15627542528 (14903.59 GiB 16002.60 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262056 sectors, after=0 sectors
State : clean
Device UUID : 2b09eed0:0a6ead54:48671d28:0abd1b6e
Internal Bitmap : 8 sectors from superblock
Update Time : Sat Sep 2 18:54:20 2017
Bad Block Log : 512 entries available at offset 72 sectors
Checksum : 46fb325e - correct
Events : 197036
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 1
Array State : AAAAA ('A' == active, '.' == missing, 'R' ==
replacing)
/dev/sdh1:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : 954b2546:5c467e9c:a4eb74e3:27dad837
Name : impala:0
Creation Time : Fri May 22 15:32:31 2015
Raid Level : raid5
Raid Devices : 5
Avail Dev Size : 7813771264 (3725.90 GiB 4000.65 GB)
Array Size : 15627542528 (14903.59 GiB 16002.60 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262056 sectors, after=0 sectors
State : clean
Device UUID : 324b49de:233d8769:7f75afad:dddb0ec8
Internal Bitmap : 8 sectors from superblock
Update Time : Sat Sep 2 18:54:20 2017
Bad Block Log : 512 entries available at offset 72 sectors
Checksum : 48b57088 - correct
Events : 197036
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 0
Array State : AAAAA ('A' == active, '.' == missing, 'R' ==
replacing)
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