All,
The simple patch suggested by Lance Robinson was successful in
bringing up 18 disk RAID-5 on our stock RedHat 6.0 system. The changes
were made on a "pure" kernel,modules,raidtools with no other previous
customization.
Our test was on partitions distributed over 2 disks. We got
repeat
All,
MANY THANKS for this TREMENDOUS response to my query - at
least 3 paths to a solution, wow! We'll try Lance's patch to
start with, and let you know how it works. (We're still with
stock RH 6.0.) But an official 27 disk solution will be really
nice once we figure out how to upgrade the res
On Mon, 30 Aug 1999, D. Lance Robinson wrote:
> #define MD_SB_DESCRIPTOR_WORDS 32
> #define MD_SB_DISKS 20
> #define MD_SB_DISK_WORDS (MD_SB_DESCRIPTOR_WORDS * MD_SB_DISKS)
oops. I've just re-checked the superblock layout calculations to prove you
wrong, but actually it t
On 08/30, D. Lance Robinson wrote:
> Lawrence,
>
> If you don't care about being 'standard', There is plenty of fluff in
> the superblock to make room for more disks. I don't know how well
> behaved all the tools are at using the symbolic constants though.
[...]
> Try it out, let us know if the
Hello Ingo , Yes, Yes, yes Thank you Ingo . more below .
On Tue, 31 Aug 1999, Ingo Molnar wrote:
> On Mon, 30 Aug 1999, Lawrence Dickson wrote:
>
> >I guess this has been asked before, but - when will the RAID code get
> > past the 12 disk limit? We'd even be willing to us
On Mon, 30 Aug 1999, Lawrence Dickson wrote:
>I guess this has been asked before, but - when will the RAID code get
> past the 12 disk limit? We'd even be willing to use a variant - our
> customer wants 18 disk RAID-5 real bad.
yes, this has been requested before. I'm now mainly working on
Lawrence,
If you don't care about being 'standard', There is plenty of fluff in
the superblock to make room for more disks. I don't know how well
behaved all the tools are at using the symbolic constants though. To
Support 18 devices, you will need to allow at least 19 disks (one for
the spare/r
Lawrence Dickson wrote:
>I guess this has been asked before, but - when will the RAID
> code get past the 12 disk limit? We'd even be willing to use
> a variant - our customer wants 18 disk RAID-5 real bad.
A solution you may already be aware of is to use two 9 disk RAID5 sets, and
then use t
