[CentOS] mdadm size issues
John R Pierce
pierce at hogranch.com
Thu Sep 24 06:25:43 UTC 2009
Nathan Norton wrote:
> Hi,
>
> I am trying to create a 10 drive raid6 array. OS is Centos 5.3 (64 Bit)
>
thats way too big of a single raid stripe set. rebuilding that when a
drive fails will take days, maybe even weeks.
a volume that big (8*2TB == 16TB) will need to be partitioned as GPT
rather than MBR.
a 16TB file system will be unwieldy when something goes sideways and it
requires a FSCK or similar.
your output *looks* like its built and its busy striping. I'd wait
about 12 hours and check the status again, then whatever % its done,
take (1 / that fraction) times the number of hours so far, and thats how
long it will take to complete, eg, if its 5% done after 12 hours, it
will take (1/.05)*12 hours = 10 days to complete
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