Ira Abramov wrote:
is there an official procedure for this or should one
"improvise"?
What raid level do you want to add?
RAID1.
there are two standalone disks in there, they want to add another to
mirror one of the existing ones.
SCSI? Do NOT use raid-1 on two IDE disks that reside on the same bus, as
performance is going to suck big time. I don't know how well it will
work with two disks on separate buses, but another disk on one of them.
In theory, SecurePlatform is no different than any other Linux. It's
just a standard system with a couple of extra software pieces, a couple
of which in the kernel.
plus there is no compiler, no kernel source readily available, old
libraries since it's based on RHL 7.x, and quite a few other changes.
That's not a problem. I believe you will find a kernel source on the CD,
but if not, just email Check Point and ask for one. They were responsive
to GPL compliance requests in the past, and I doubt that has changed.
As for the rest, just install another SPLAT on a spare machine, and
compile an RPM there.
oh, and I didn't read any fine print, but I bet adding GCC on my own to
the machine voids the warrenty or something.
THEY PROVIDE WARRANTY????? Wow, that's excellent news.
it's supported as an
appliance I am guessing, so I would not want to just go around CP's
protections (easy at it may be with a root password) but instead use
what they recommend to do.
I don't think so. It's an RPM based distro. I'm also not aware that it's
supported at all.
One more thing - recompiling the (non-existant) kernel source may also
violate the warrenty, so that's why I was wondering if the official
supported kernel supported MD, or the older method of /etc/raidtab
(whatever it was called) or none at all.
Like I said, I'm not sure there is a warranty. Even if there is, as you
and I both know that it won't break anything, just resort to non-raided
system with the original kernel whenever you need support.
The general procedure for setting up md on the fly is to set up the raid
with one failed disk (being the disk that currently holds the data),
copy the data to the raid, and then attaching the last disk to the raid.
I've only tried it on raid-1 before, but there is no reason for it not
to work on any other raid level.
no, except the client wants to do it on the fly with a living system, at
minimum downtime. sounds a bit of a problem to me.
the howtos indeed tell you to set up MD in failed mode, move over the
stuff to it, reboot the system from the new MD, format the old disk (or
if you are sane, get a virgin disk) and "re"attach the "failed" pats of
the raid.
they don't discuss doing it in-place by just adding a disk and synching
to it.
I believe that if you tried to phrase to yourself the phases of what you
describe, you will find out that the request makes no sense. The root FS
is mounted over /dev/hda1, and you want to move it to /dev/md0. How can
you do that without unmounting /dev/hda1?
Anyways, that's just one reboot worth of down time. I'm not aware of any
way of replacing the root FS of a running system without a reboot. You
can pivot root, I guess, but that won't help with unmounting the old
files, as file in use will prevent you from unmounting the old file
system anyways.
This is before I mention that you WANT that reboot, so as not to find
out that you forgot something important and the new system will not boot
(see next paragraph).
Word of advice from someone who's been there, after setting up the MD,
chroot into it and regenerate the initrd. Your original initrd likely
did not contain md, which means you won't be able to boot from it after
the change. Figuring out this single advice costed me a day of my time
to achieve. I'll invoice you by mail :-).
Depends on whether the SecurePlatform installation allows raid
installation.
well, that's something I'd love to know.
Shachar
--
Shachar Shemesh
Lingnu Open Source Consulting ltd.
http://www.lingnu.com/
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