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How to delete software RAID 1 on NW 6.5 without data loss on NSS volumes & pools?

Hi,

We use mirror set (software RAID 1) of 2 HDDs.
One of this HDDs was physically removed from NetWare 6.5 server.
Then we deleted offline RAID Segment using nssmu utility on server.
Could you please write how to delete RAID Device in this configuration
of server without data loss on NSS volumes & pools?
Pls mind tt we don't need the remained cosmetic RAID Device.

Thanks for any help,
Kirill
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Anonymous_User Absent Member.
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Re: How to delete software RAID 1 on NW 6.5 without data loss on NSS volumes & pools?

For breaking a mirror, I prefer NSSMU, btw. NRM on NW6 may not handle the
choice of partitions correctly; NW6.5 looks a bit better, but I haven't
checked it out.

For breaking the mirror, there used to be a "this will delete all data"
warning, I don't see that now in a recent version of NSSMU.

The only way to preserve the old copy is to disconnect it before breaking
the mirror; the OS can't wipe the partition when it is "offline". [This
doesn't apply to Kirill, since the "old copy" is a dead disk].

When you want to remove the old device:

1) as always, have a working backup [e.g., on tape].

2) Pull the bad disk out of the system. [since this is a SAN device, you
can probably do this with the system up by pulling a cable
or by setting it "offline" in the array manager]

3) load NSSMU

4) Select DEVICES

5) Press F2 to scan devices

6) return to the main NSSMU menu

7) Select RAID devices

😎 Select the RAID (mirror) set of interest

9) Select the "offline" partition

10) Press the DELETE key

11) You now have a "complete" mirror, even if it only has 1 partition in
it.


/dps

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Anonymous_User Absent Member.
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Re: How to delete software RAID 1 on NW 6.5 without data loss on NSS volumes & pools?

On Fri, 04 Nov 2005 11:24:58 -0800, Dave Schneider
<dave.schneider@emulex.com> wrote:


> For breaking the mirror, there used to be a "this will delete all data"
> warning, I don't see that now in a recent version of NSSMU.
>
> The only way to preserve the old copy is to disconnect it before
> breaking the mirror; the OS can't wipe the partition when it is
> "offline". [This doesn't apply to Kirill, since the "old copy" is a
> dead disk].


> 2) Pull the bad disk out of the system. [since this is a SAN device, you
> can probably do this with the system up by pulling a cable
> or by setting it "offline" in the array manager]


Just in case this was confusing, these instructions were originally meant
for someone migrating data from an old device to a new one by using
mirroring. Hence the reference to "preserving the old copy" and "since
this is a SAN device".

For drives in the system enclosure, you may have to oepn the box and
fiddle with several cables to remove the old drive and put the new one in,
but you may have worked through that already.

Good luck!

/dps

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Antw: How to delete software RAID 1 on NW 6.5 without data loss onNSS volumes & pools?

Deleteing the raid devices will kill the partition in any way.

Maybe (?) it works as dave wrote, when you are able to disconnect the device holding the partition from the system (SAN), then delete the raid device, reconnect the device holding the partition, do a scan all. But im not sure if the raid device definition is writte to the partition table on the device!?


Erik




Mit freundlichem Gruß,
Erik Brunne
Abt. EDV

Brunne@Kieback-Peter.de
030 - 60095 420

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Anonymous_User Absent Member.
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Re: How to delete software RAID 1 on NW 6.5 without data loss on NSSvolumes & pools?

Hi,

esoap wrote:
>
> Hi,
>
> We use mirror set (software RAID 1) of 2 HDDs.
> One of this HDDs was physically removed from NetWare 6.5 server.
> Then we deleted offline RAID Segment using nssmu utility on server.


That's all you need and can do.

> Could you please write how to delete RAID Device in this configuration
> of server without data loss on NSS volumes & pools?


You are not supposed to delete the Raid Device at all. If you do, you'll
wipe the disk clean.

> Pls mind tt we don't need the remained cosmetic RAID Device.


It's not cosmetic at all, it's always there if a Partition is Raid
enabled, even if you never had a Raid setup.

CU,
--
Massimo Rosen
Novell Support Connection Sysop
No emails please!
http://www.cfc-it.de
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Re: Antw: How to delete software RAID 1 on NW 6.5 without data loss on NSS volumes & pools?

On Tue, 08 Nov 2005 01:58:46 -0800, Erik Brunne <Brunne@kieback-peter.de>
wrote:

> Deleteing the raid devices will kill the partition in any way.


Yes; only delete the offline partition.

>
> Maybe (?) it works as dave wrote, when you are able to disconnect the
> device holding the partition from the system (SAN), then delete the raid
> device, reconnect the device holding the partition, do a scan all. But
> im not sure if the raid device definition is writte to the partition
> table on the device!?
>


See also Massimo's answer.

/dps

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Re: Antw: How to delete software RAID 1 on NW 6.5 without data losson NSS volumes & pools?

Hey Dave!

Thanks for comment!
I have deleted and restored 4 400Gig volumes in our cluster to remove the raid config last week :-(.
Left are some small volumes i have to do the same the next days .

Erik



Mit freundlichem Gruß,
Erik Brunne
Abt. EDV

Brunne@Kieback-Peter.de
030 - 60095 420

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Antw: Re: How to delete software RAID 1 on NW 6.5 without data losson NSS volumes & pools?

Thanks, Erik

Mit freundlichem Gruß,
Erik Brunne
Abt. EDV

Brunne@Kieback-Peter.de
030 - 60095 420

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