On 31/10/2010 21:44, Neil Brown wrote:
On Sun, 31 Oct 2010 21:18:52 +0000
Jon Hardcastle<jonathan.hardcastle@xxxxxxxxx> wrote:
Hi,
Thanks for your help. I use 0.90 as that is what there was when the
machine was build ~3yrs ago.. the array has been grown and resized
since then.
Does anyone have a feature list for the superblocks? Why upgrade.....?
The "md" man page mentions a couple of differences:
- v1.x can handle more than 28 devices in an array
- v1.x can easily be moved between hosts with different endian-ness
- v1.x can put the metadata at the front of the array
I should probably add the other differences.
- with 0.90 there can be confusion about whether a superblock applies
to the whole device or to just the last partition (if it start on a
64K boundary). 1.x doesn't have that problem
- With 1.x a device recovery can be checkpointed and restarted.
- with 0.90, the maximum component for RAID1 or higher is 2TB (or maybe
4TB, not sure). With 1.x you can go much higher.
Aha. Some other good info for me to perhaps incorporate if I ever get
round to trying to patch the man page. In fact I probably ought to
review the last few months' list postings, and especially Neil B's.
Cheers,
John.
--
To unsubscribe from this list: send the line "unsubscribe linux-raid" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
