compaq proliant dl380 raid issue

"MattD.." writes:
[...]
> the system up. DO NOT remove or interfere with any of the other
> drives, since RAID can only cope with 1 fail at a time. Inserting a
[...]

FWIW, RAID 6 can. (It uses two parity bits.)

--
David Magda <dmagda at ee.ryerson.ca>, http://www.magda.ca/
Because the innovator has for enemies all those who have done well under
the old conditions, and lukewarm defenders in those who may do well
under the new. -- Niccolo Machiavelli, _The Prince_, Chapter VI
 >> Stay informed about: compaq proliant dl380 raid issue 

On Wed, 13 Aug 2003 18:18:23 +0200, MattD.. wrote:

> If it has failed, the yellow light (fail) will be on on the drive
> carrier. If it is, the controller has shut the drive down and it can be
> removed with the system up. DO NOT remove or interfere with any of the
> other drives, since RAID can only cope with 1 fail at a time. Inserting
> a new drive will cause the controller to reinitialise the array and
> rebuild the array. I can't decide if you're in RAID5 or RAID1, but I'm
> assuming the latter.
>
> Note, this only applies if you have the hot-plug backplane on the compaq
> box (drives plug in like cartridges in the front of the rack). If you're
> using a SCSI cable without drive carriers, you will need to power down
> the machine and change the drive. Once you have a working drive in place
> of the failure, you don't really need to do much else but allow the
> array controller to rebuild the array on its own.

thank you very much. i wish that part would be a little bit more
documented in the handbook.

btw, it's a raid 1 and its internal scsi-3 disks which can be plugged out
in the front.

is there a command to controll the reconstruction process? man 4 ida
points me to camcontrol( (see also part).
 >> Stay informed about: compaq proliant dl380 raid issue 

Newbie writes:

> > Note, this only applies if you have the hot-plug backplane on the
> > compaq box (drives plug in like cartridges in the front of the
> > rack). If you're using a SCSI cable without drive carriers, you
[...]
> thank you very much. i wish that part would be a little bit more
> documented in the handbook.

Why would information about a particular hardware product be in
FreeBSD's Handbook? Wouldn't the most logical place to look for the
information be in the Proliant's documentation (or Campaq's website)?

--
David Magda <dmagda at ee.ryerson.ca>, http://www.magda.ca/
Because the innovator has for enemies all those who have done well under
the old conditions, and lukewarm defenders in those who may do well
under the new. -- Niccolo Machiavelli, _The Prince_, Chapter VI
 >> Stay informed about: compaq proliant dl380 raid issue 

On Wed, 13 Aug 2003 21:08:30 +0200, David Magda wrote:

> Newbie writes:
>
>> > Note, this only applies if you have the hot-plug backplane on the
>> > compaq box (drives plug in like cartridges in the front of the rack).
>> > If you're using a SCSI cable without drive carriers, you
> [...]
>> thank you very much. i wish that part would be a little bit more
>> documented in the handbook.
>
> Why would information about a particular hardware product be in
> FreeBSD's Handbook? Wouldn't the most logical place to look for the
> information be in the Proliant's documentation (or Campaq's website)?

well, what if there is a command like wicontrol for wireless cards? a
command that would show me some information about the raid status or what
about the vinum "shell", that's documented as well and nobody would come
on the idea to search the manufacturer documentation. by the way, i've
never ever seen a company writing a documentation for freebsd, windows *
yes, if you are really lucky you'll find a docu for mac's...
 >> Stay informed about: compaq proliant dl380 raid issue 

In article ,
Newbie wrote:
[snip]
> well, what if there is a command like wicontrol for wireless cards? a

Yes, let's find out how much data we can store in a store and forward
network. Just keep them packets going!

> command that would show me some information about the raid status or what
> about the vinum "shell", that's documented as well and nobody would come
> on the idea to search the manufacturer documentation.

True hardware raid generally sits `below' the OS and presents only one
logical `disk' to it. There might or might not be configuration or control
utilities available for use from within an OS but that is very vendor
dependent.


--
j p d (at) d s b (dot) t u d e l f t (dot) n l .
 >> Stay informed about: compaq proliant dl380 raid issue 

Newbie writes:

> On Wed, 13 Aug 2003 21:08:30 +0200, David Magda wrote:
>
> > Newbie writes:
> >
> >> > Note, this only applies if you have the hot-plug backplane on the
> >> > compaq box (drives plug in like cartridges in the front of the rack).
> >> > If you're using a SCSI cable without drive carriers, you
> > [...]
> >> thank you very much. i wish that part would be a little bit more
> >> documented in the handbook.
> >
> > Why would information about a particular hardware product be in
> > FreeBSD's Handbook? Wouldn't the most logical place to look for the
> > information be in the Proliant's documentation (or Campaq's website)?
>
> well, what if there is a command like wicontrol for wireless cards?
> a command that would show me some information about the raid status
> or what about the vinum "shell", that's documented as well and
[...]

The context (seen above) is on hot-swapping. There is no utility
availble (for any OS that I know of) that says "yes, this backplane
is hot-swappable". When you buy the hardware it usually says somplace
whether the disks are hot-swappable.

Hardware RAID generally means the OS sees it as a single LUN (as
pointed out by another follow-up).

The main exception to this rule is when the company makes both the
server and the OS (e.g., Sun), and you need special utilities to
manage the server (e.g., Sun Entrprise-class servers).

--
David Magda <dmagda at ee.ryerson.ca>, http://www.magda.ca/
Because the innovator has for enemies all those who have done well under
the old conditions, and lukewarm defenders in those who may do well
under the new. -- Niccolo Machiavelli, _The Prince_, Chapter VI
 >> Stay informed about: compaq proliant dl380 raid issue 

On Wed, 13 Aug 2003 18:18:23 +0200, MattD.. wrote:

> On 13 Aug 2003, Newbie wrote:
> If it has failed, the yellow light (fail) will be on on the drive
> carrier. If it is, the controller has shut the drive down and it can be
> removed with the system up. DO NOT remove or interfere with any of the
> other drives, since RAID can only cope with 1 fail at a time. Inserting
> a new drive will cause the controller to reinitialise the array and
> rebuild the array. I can't decide if you're in RAID5 or RAID1, but I'm
> assuming the latter.
>
> Note, this only applies if you have the hot-plug backplane on the compaq
> box (drives plug in like cartridges in the front of the rack). If you're
> using a SCSI cable without drive carriers, you will need to power down
> the machine and change the drive. Once you have a working drive in place
> of the failure, you don't really need to do much else but allow the
> array controller to rebuild the array on its own.

thank you matt, i replaced the disk without power cycling and everything
seems to have worked.

boris
 >> Stay informed about: compaq proliant dl380 raid issue 

On Thu, 14 Aug 2003 00:33:04 +0200, David Magda wrote:

[cut]
> The context (seen above) is on hot-swapping. There is no utility
> availble (for any OS that I know of) that says "yes, this backplane is
> hot-swappable". When you buy the hardware it usually says somplace
> whether the disks are hot-swappable.
>
> Hardware RAID generally means the OS sees it as a single LUN (as pointed
> out by another follow-up).

i see. i was not aware of that. i guess i was confused cause i also
administrate some network appliance filer (some of you might know them
but i wouldn't bet). these filer have an own os called ontap which allows
you to check the raid-op's, reconstruction process, ...

thank's for the enlightenment also to the other people who answered

boris
 >> Stay informed about: compaq proliant dl380 raid issue