well, I left a dd running
dd of=/dev/md1 if=/dev/zero bs=4k
and it filled the entire array, with nary a peep..
I've also constructed ext2 and ext3 filesystems and destroyed
them, and more..
Four previous attempts to build the array using "/dev/sda" type
devices failed, all in different ways.. so I'm at a loss as well..
The cables are new and short. the terminator is a sun differential
one, I can only think that something weird is going on inside
the D1000 itself - i read somewhere the bios on that controller
board (symbios something or other) is a little bizarre and
old as well.. perhaps it likes to use the front of each disk
for something and a partition table avoids stepping on that..
no idea.. :(
Anyway I'm just happy this works, and that slightly different
sized partitions are ok in a raid5 array. One thing - all the
online docs recommend you use partitions and label them as raid
auto (type FD), all the example raidtabs i've ever see on the
web use partitions, so maybe its useful to warn if one tries to
mkraid on non-partitioned disks? how would one label /dev/sda
as type FD anyway? just a thought..
thanks for the help
-Justin
On Wed, Feb 20, 2002 at 01:03:58AM +0100, Jakob Østergaard wrote:
> On Tue, Feb 19, 2002 at 05:50:30PM -0500, Max TenEyck Woodbury wrote:
> > Jakob Østergaard wrote:
> > >
> > > On Tue, Feb 19, 2002 at 07:47:06PM +0100, Jakob Østergaard wrote:
> > > ...
> > > > If you use multiple partitions on the disks, the transfer time
> > > > will significantly drop (because of massive seeking) - and this
> > > > could explain why the cable failure doesn't show up - I guess.
> > >
> > > s/transfer time/transfer rate/
> > >
> > > --
> >
> > This is a little puzzling. You'd expect problems with high
> > transfer rates, not low, if it was a cable problem.
>
> Yes. (By "transfer rate" I mean bus utilization, not bus clock).
>
> Utilizing the bus at 10% versus utilizing it at 100% would cause
> fewer problems. Doesn't that sound plausible ?
>
> --
> ................................................................
> : jakob@unthought.net : And I see the elder races, :
> :.........................: putrid forms of man :
> : Jakob Østergaard : See him rise and claim the earth, :
> : OZ9ABN : his downfall is at hand. :
> :.........................:............{Konkhra}...............:
> -
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--
Justin Beech http://www.dslreports.com
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