Anonymous_User Absent Member.
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NSS mirroring problem

Hi!

Using the Novell SBS 6.5 sp1, a tree with 3 servers:

1. Border Manager
2. GroupWise (NAT)
3. WEB (NAT) - Apache 2, MySQL ver. 4.0.15a, PHP 4.2.3.

The WEB (third) server with 2 SATA HDs, every partition (including DRDOS) on first HD is mirrored on the second HD.

After an electricity problem the second HD failed and technician replaced it.

Now the server run, but there is a problem to remirror it.

I'm not sure I understand right the documentation and I'm scared to delete by mistake any of the volumes or partition on the first drive and loose the data.

When the new second HD is disconnected NSSMU shows a single drive, but watching the RAID devices (from NSSMU Main Menu) it shows they are partially mirrored.
The option there is to delete segment. Will it delete the volumes\data from the first drive or only the mirror drive?

I'm confused, please help me to solve the problem.

TIA

Nanu
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Anonymous_User Absent Member.
Absent Member.

Re: NSS mirroring problem

On Tue, 09 Jan 2007 23:30:34 -0800, Nanu Kalmanovitz
<nanu@kalmanovitz.co.il> wrote:

> The WEB (third) server with 2 SATA HDs, every partition (including
> DRDOS) on first HD is mirrored on the second HD.


How are you mirroring the DRDOS partition? NW's built-in mirroring won't
do that.

> After an electricity problem the second HD failed and technician
> replaced it.
>
> Now the server run, but there is a problem to remirror it.
>
> I'm not sure I understand right the documentation and I'm scared to
> delete by mistake any of the volumes or partition on the first drive and
> loose the data.
>
> When the new second HD is disconnected NSSMU shows a single drive, but
> watching the RAID devices (from NSSMU Main Menu) it shows they are
> partially mirrored.


This is normal, but if you select the RAID device and press the ENTER key,
it should show you the segments -- and the segments at the first drive
should show 100% and the segments from the (old) 2nd drive should show as
"not present".

> The option there is to delete segment. Will it delete the volumes\data
> from the first drive or only the mirror drive?


I wouldn't delete if I'm not looking at the segment list -- I think it
deletes *everything* when you do it at the higher level. As above, from
the RAID devices list, select the RAID-of-interest, press enter, and look
at the segments to select the one(s) to delete.

BTW, using NSSMU, you can add the new drive either before or after
deleting the segments from the old dead drive. In either case, from the
RAID devices list, select the device of interest and press the key for
EXPAND (F3, I think). Select the new drive from the free space list (oh,
it doesn't get on the list unless you've initialized it back at the
DEVICES menu -- but since it doesn't have any partitions on it, it should
be easy to identify on that menu).

> I'm confused, please help me to solve the problem.


Hope this helps. Below I've pasted a slightly revised version of my
canned notes, and I've left doing the NEW drive before removing the old:

My recommendation is as follows (see also mirroring threads in
novell.support.netware.6x.storage-media):

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

2) Go about installing the new disk [For internal drives, shutdown first
and reboot afterwards]

3) load NSSMU

4) Select DEVICES, and scroll down to the new device.

5) Press F3 to initialize it

6) return to top level menu and select RAID devices

7) select the partition of interest

😎 Press F3 to expand the mirror

9) Select the new device from the popup list.

10) Press F5 occasionally if you want to see the mirror percentage update,
otherwise exit.


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
[for internal drives, you'd shutdown first, and reboot afterwards]
[And I think you've already done this -- so skip steps 4-6]

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 [if you do this before adding the new
drive, the mirror only has 1 partition in it -- for now].


/dps

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Anonymous_User Absent Member.
Absent Member.

Re: NSS mirroring problem - solved

Thanks!
I'm mirroring the DRDOS partition....manually with xcopy 😉

Thanks again problem solved.

Nanu



>>> Dave Schneider<dave.schneider@emulex.com> 10/01/2007 21:40:41 >>>


On Tue, 09 Jan 2007 23:30:34 -0800, Nanu Kalmanovitz
<nanu@kalmanovitz.co.il> wrote:


> The WEB (third) server with 2 SATA HDs, every partition (including
> DRDOS) on first HD is mirrored on the second HD.


How are you mirroring the DRDOS partition? NW's built-in mirroring won't
do that.


> After an electricity problem the second HD failed and technician
> replaced it.
>
> Now the server run, but there is a problem to remirror it.
>
> I'm not sure I understand right the documentation and I'm scared to
> delete by mistake any of the volumes or partition on the first drive and
> loose the data.
>
> When the new second HD is disconnected NSSMU shows a single drive, but
> watching the RAID devices (from NSSMU Main Menu) it shows they are
> partially mirrored.


This is normal, but if you select the RAID device and press the ENTER key,
it should show you the segments -- and the segments at the first drive
should show 100% and the segments from the (old) 2nd drive should show as
"not present".


> The option there is to delete segment. Will it delete the volumes\data
> from the first drive or only the mirror drive?


I wouldn't delete if I'm not looking at the segment list -- I think it
deletes *everything* when you do it at the higher level. As above, from
the RAID devices list, select the RAID-of-interest, press enter, and look
at the segments to select the one(s) to delete.

BTW, using NSSMU, you can add the new drive either before or after
deleting the segments from the old dead drive. In either case, from the
RAID devices list, select the device of interest and press the key for
EXPAND (F3, I think). Select the new drive from the free space list (oh,
it doesn't get on the list unless you've initialized it back at the
DEVICES menu -- but since it doesn't have any partitions on it, it should
be easy to identify on that menu).


> I'm confused, please help me to solve the problem.


Hope this helps. Below I've pasted a slightly revised version of my
canned notes, and I've left doing the NEW drive before removing the old:

My recommendation is as follows (see also mirroring threads in
novell.support.netware.6x.storage-media):

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

2) Go about installing the new disk [For internal drives, shutdown first
and reboot afterwards]

3) load NSSMU

4) Select DEVICES, and scroll down to the new device.

5) Press F3 to initialize it

6) return to top level menu and select RAID devices

7) select the partition of interest

😎 Press F3 to expand the mirror

9) Select the new device from the popup list.

10) Press F5 occasionally if you want to see the mirror percentage update,
otherwise exit.


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
[for internal drives, you'd shutdown first, and reboot afterwards]
[And I think you've already done this -- so skip steps 4-6]

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 [if you do this before adding the new
drive, the mirror only has 1 partition in it -- for now].


/dps

--
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