On Monday August 19, ARechenberg@shermanfinancialgroup.com wrote:
Interesting, when I initially built my array (with RedHat raidtools-0.90
not mdctl/mdadm, on kernel 2.4.17) it stated that I could only stripe
across 12 devices. Do you have any idea from which this number comes?
Is it an old limit?
Yes, some old limit. I don't remember the exact details, they were
never important to me, but I think it involved some miscalculation
about how many entries would actually fit in the 4096 byte superblock.
Hopefully 2.6 will have a much higher limit (using an optional
different superblock format).
NeilBrown
With regards to your message at 03:01 PM 8/19/02, Neil Brown. Where you stated:
On Monday August 19, ARechenberg@shermanfinancialgroup.com wrote:
quoted
Interesting, when I initially built my array (with RedHat raidtools-0.90
not mdctl/mdadm, on kernel 2.4.17) it stated that I could only stripe
across 12 devices. Do you have any idea from which this number comes?
Is it an old limit?
Yes, some old limit. I don't remember the exact details, they were
never important to me, but I think it involved some miscalculation
about how many entries would actually fit in the 4096 byte superblock.
As shipped in Red Hat 7.2 and earlier that limit existed.
It was fixed in 7.3
If you need a copy of the srpm or rpm with the patches applied let me know.
If you are using Disk Druid from 7.2 or earlier, you will need to update
that as well, as it does not recognize the fix.
With our best regards,
Maurice W. Hilarius Telephone: 01-780-456-9771
Hard Data Ltd. FAX: 01-780-456-9772
11060 - 166 Avenue mailto:maurice@harddata.com
Edmonton, AB, Canada http://www.harddata.com/
T5X 1Y3
2.3TB RAID5 NAS server - dual AthlonMP CPU, Linux, $10,995 CAD / $6850 USD