RAID6 - whole disk vs partitions

[Steven Haigh <netwiz@crc.id.au>]

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Hi all,

I'm revisiting this topic after a few years - so excuse me if I'm a
little behind the times on this questioning.

I'm just starting to replace some 5 year old disks in a RAID6 (5 disks)
due to one having started to throw uncorrectable / reallocated sectors.
As such, it seems a good time to go to 3Tb drives - which are only $20
more than 2Tb drives.

The array is created as follows:
md2 : active raid6 sdf[0] sde[6] sdg[7] sdd[5] sdc[8]
      5860150272 blocks super 1.2 level 6, 128k chunk, algorithm 2 [5/5]
[UUUUU]

I've always used the whole disk for the RAID6 - as from what I
understand, this gives the best layout for various drives - no matter if
they're 512 or 4096 byte sectors.

Is this still the case?

I've noticed that my resync speeds on this RAID6 hover around 60Mb/sec -
which I was expecting to be a bit quicker (although I haven't tested
speeds on this array for years).

Currently using kernel 4.1.15 on an EL6 install.

Would be grateful for any input people may have on these topics.

-- 
Steven Haigh

Email: netwiz@crc.id.au
Web: https://www.crc.id.au
Phone: (03) 9001 6090 - 0412 935 897


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