re: Fixing vinum after removing a HDD

2004-12-16 Thread orville weyrich
 Date: Thu, 16 Dec 2004 21:56:29 -0800 (PST)
 From: orville weyrich [EMAIL PROTECTED]
 Subject: re: Fixing vinum after removing a HDD
 To: [EMAIL PROTECTED]
 
 On Wed, 2004-02-11 at 17:02, Greg 'groggy' Lehey
 wrote:
   resetconfig
   The resetconfig command completely
 obliterates the vinum configu-
   ration on a system.  Use this command
 only when you want to com-
   pletely delete the configuration. 
  
  I'm completely baffled that people want to use
 this
 command so much.
  The correct sequence is to remove the drive,
 replace
 it with something
  else with a Vinum partition, and then start the
 defective objects.
  
  It depends on the volume structures as to whether
 the data can still
  be recovered.
 
 PLEASE PLEASE PLEASE elaborate on what volume
 structuers CAN be recovered after resetconfig and
 what
 strucuters cannot.
 
 I am trying to deal with *invalid* drives in
 dumpconfig and not getting any answers.
 
 Thanks
 
 
 
   
   
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Re: Fixing vinum after removing a HDD

2004-02-22 Thread Greg 'groggy' Lehey
On Wednesday, 11 February 2004 at 19:30:52 -0800, Micheas Herman wrote:
 On Wed, 2004-02-11 at 17:02, Greg 'groggy' Lehey wrote:
 On Wednesday,  4 February 2004 at 19:52:03 +0100, Stijn Hoop wrote:
 On Wed, Feb 04, 2004 at 07:41:48PM +0100, [EMAIL PROTECTED] wrote:
 I'm running FreeBSD 4.8 on a system with 5 HDD's. ad0 is to be removed
 from the system. ad1, ad2 and ad3 contain my vinum drives. FreeBSD resides
 on the last disk (da0).

 Can anyone tell me if the following procedure is the right way to do it?
 1. physically remove ad0
 2. vinum resetconfig
 3. change drivenumbers in vinum.conf
 4. run vinum with the new configfile

 As far as my (limited) vinum knowledge goes, you really don't need to do a
 resetconfig.

 Correct.  From the man page:

  resetconfig
  The resetconfig command completely obliterates the vinum configu-
  ration on a system.  Use this command only when you want to com-
  pletely delete the configuration.

 I'm completely baffled that people want to use this command so much.
 The correct sequence is to remove the drive, replace it with something
 else with a Vinum partition, and then start the defective objects.

 Just a guess (arm chair psychology of users), but I suspect it
 is because they are thinking that they need to re-setup their
 drive.

 Maybe deleteconfig would be a more self documenting flag.

Hmm, maybe.  I'll think about this.

Greg
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Re: Fixing vinum after removing a HDD

2004-02-11 Thread Greg 'groggy' Lehey
On Wednesday,  4 February 2004 at 19:52:03 +0100, Stijn Hoop wrote:
 On Wed, Feb 04, 2004 at 07:41:48PM +0100, [EMAIL PROTECTED] wrote:
 I'm running FreeBSD 4.8 on a system with 5 HDD's. ad0 is to be removed
 from the system. ad1, ad2 and ad3 contain my vinum drives. FreeBSD resides
 on the last disk (da0).

 Can anyone tell me if the following procedure is the right way to do it?
 1. physically remove ad0
 2. vinum resetconfig
 3. change drivenumbers in vinum.conf
 4. run vinum with the new configfile

 As far as my (limited) vinum knowledge goes, you really don't need to do a
 resetconfig.

Correct.  From the man page:

 resetconfig
 The resetconfig command completely obliterates the vinum configu-
 ration on a system.  Use this command only when you want to com-
 pletely delete the configuration. 

I'm completely baffled that people want to use this command so much.
The correct sequence is to remove the drive, replace it with something
else with a Vinum partition, and then start the defective objects.

It depends on the volume structures as to whether the data can still
be recovered.

Greg
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Re: Fixing vinum after removing a HDD

2004-02-11 Thread Micheas Herman
On Wed, 2004-02-11 at 17:02, Greg 'groggy' Lehey wrote:
 On Wednesday,  4 February 2004 at 19:52:03 +0100, Stijn Hoop wrote:
  On Wed, Feb 04, 2004 at 07:41:48PM +0100, [EMAIL PROTECTED] wrote:
  I'm running FreeBSD 4.8 on a system with 5 HDD's. ad0 is to be removed
  from the system. ad1, ad2 and ad3 contain my vinum drives. FreeBSD resides
  on the last disk (da0).
 
  Can anyone tell me if the following procedure is the right way to do it?
  1. physically remove ad0
  2. vinum resetconfig
  3. change drivenumbers in vinum.conf
  4. run vinum with the new configfile
 
  As far as my (limited) vinum knowledge goes, you really don't need to do a
  resetconfig.
 
 Correct.  From the man page:
 
  resetconfig
  The resetconfig command completely obliterates the vinum configu-
  ration on a system.  Use this command only when you want to com-
  pletely delete the configuration. 
 
 I'm completely baffled that people want to use this command so much.
 The correct sequence is to remove the drive, replace it with something
 else with a Vinum partition, and then start the defective objects.

Just a guess (arm chair psychology of users), but I suspect it
is because they are thinking that they need to re-setup their
drive.

Maybe deleteconfig would be a more self documenting flag.


Micheas


 
 It depends on the volume structures as to whether the data can still
 be recovered.
 
 Greg
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Fixing vinum after removing a HDD

2004-02-04 Thread dontspamhenk
Dear all,

I'm running FreeBSD 4.8 on a system with 5 HDD's. ad0 is to be removed
from the system. ad1, ad2 and ad3 contain my vinum drives. FreeBSD resides
on the last disk (da0).

Can anyone tell me if the following procedure is the right way to do it?
1. physically remove ad0
2. vinum resetconfig
3. change drivenumbers in vinum.conf
4. run vinum with the new configfile

Thanks, Marc


Disks currently in the system:
 ad0 (unused disk, to be removed from the system)
 ad1 Maxtor 6Y080L0   (contains 1st vinum subdisk)
 ad2 Maxtor 6Y080L0   (contains 2nd vinum subdisk)
 ad3 Maxtor 6Y080L0   (contains 3rd vinum subdisk)
 da0 QUANTUM ATLAS10K2-TY092L DDD6(contains all system partitions)

My current vinum.conf:
 drive a device /dev/ad1s1h
 drive b device /dev/ad2s1h
 drive c device /dev/ad3s1h
 volume BigDisk0
 plex org concat
 sd length 78159m drive a
 sd length 78159m drive b
 sd length 78159m drive c


Disks after removing the 1st disk
 ad0 Maxtor 6Y080L0   (contains 1st vinum subdisk)
 ad1 Maxtor 6Y080L0   (contains 2nd vinum subdisk)
 ad2 Maxtor 6Y080L0   (contains 3rd vinum subdisk)
 da0 QUANTUM ATLAS10K2-TY092L DDD6(contains all system partitions)

My future vinum.conf
 drive a device /dev/ad0s1h
 drive b device /dev/ad1s1h
 drive c device /dev/ad2s1h
 volume BigDisk0
 plex org concat
 sd length 78159m drive a
 sd length 78159m drive b
 sd length 78159m drive c


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Re: Fixing vinum after removing a HDD

2004-02-04 Thread Stijn Hoop
On Wed, Feb 04, 2004 at 07:41:48PM +0100, [EMAIL PROTECTED] wrote:
 I'm running FreeBSD 4.8 on a system with 5 HDD's. ad0 is to be removed
 from the system. ad1, ad2 and ad3 contain my vinum drives. FreeBSD resides
 on the last disk (da0).
 
 Can anyone tell me if the following procedure is the right way to do it?
 1. physically remove ad0
 2. vinum resetconfig
 3. change drivenumbers in vinum.conf
 4. run vinum with the new configfile

As far as my (limited) vinum knowledge goes, you really don't need to do a
resetconfig.

Vinum writes the configuration to the disk and reads the information from it.
I think it will be able to cope with a missing disk by itself because the
label on it has not changed; on what is now /dev/ad1s1h vinum has stored
the fact that this vinum drive is labeled 'a', and even if the freebsd
device node changes names, vinum will still know that the then /dev/ad0s1h
is labeled 'a'.

Unfortunately this is only my understanding and I haven't yet needed to
do such an operation for real. YMMV.

--Stijn

-- 
The right half of the brain controls the left half of the body.  This means
that only left handed people are in their right mind.


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