Here is my original query.
> Hi Everyone,
>
> I am curious if anyone out there has experience with
> using the raid option in DiskSuite.
>
> Here is my problem:
> I using DiskSuite there other day, and created a
> 4 4GB raid system. Obviously when I mounted this
> new raid system and looked at the disk space it
> showe me that I had room for about 12GB which is
> fine, because RAID5 has a redundant disk.
>
> However, when I went to grow the raid to 5 4GB disks,
> metatool reported 15GB available, but when I mounted
> the file system, it showed me 12GB. Which I thought
> was strange.
>
> I checked the output of metastat and it said that
> 4 disks were raided and 1 was Concatenated. Here
> is the output.
>
> hermes{root}57% ./metastat
> d10: RAID
> State: Okay
> Interlace: 20480 blocks
> Size: 33421680 blocks
> Original device:
> Size: 25067520 blocks
> Device Start Block Dbase State Hot Spare
> c1t2d0s7 5376 No Okay
> c1t3d0s7 5376 No Okay
> c1t4d0s7 5376 No Okay
> c1t5d0s7 5376 No Okay
> Concatenated Devices:
> Size: 8355840 blocks
> Device Start Block Dbase State Hot Spare
> c1t8d0s7
>
> Does anyone know why this is, I thought I could
> grow a raid system at anytime, but all the space
> would be reported.....
>
> I have to admit, I might be growing the raid system
> wrong, if anyone has any ideas....let me know
>
> Thanks and I will summarize
>
> Chris
> --
In summary,
It seems the only way to add another disk to a raid 5 system is to concatenate
one and then run a growfs. This really slows down performance and is not
recommended.
Therefore it seems the best way to add a disk to a existing raid system using
disksuite is to back everything up.... delete and then recreate the raid with
the additional disks and then extract everthing back on the disks....
I have enclosed all the people who replied to my message...
Thanks
Chris
>From arthur@avalon.csg.psi.com Mon Sep 15 10:51:33 1997
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To: "Christopher E. Olaes" <colaes@hercules.nhlbi.nih.gov>
From: Arthur Hyun <arthur@psi.com>
Subject: Re: Growing Raid (Disk Suite)
In-reply-to: Your message of Sat, 13 Sep 1997 23:54:10 EDT.
<199709140354.XAA16323@hercules.nhlbi.nih.gov>
Date: Mon, 15 Sep 1997 10:56:04 -0400
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|Does anyone know why this is, I thought I could
|grow a raid system at anytime, but all the space
|would be reported.....
The underlying partition is larger -- to grow the filesystem
to fit the entire partition, use "growfs". The reason for
this is that the filesystem has a size that is not changed
when you add more disks to the partition.
If you want to have a 5 disk raid-5, instead of a 4-disk + 1 concat,
you will need to rebuild the device. When you do that, you will
need to newfs the partition and restore the data from a backup.
In that case the newfs will fill the entire disk slice (by default)
and so you won't have to growfs it.
-arthur
>From kvj@ix.netcom.com Mon Sep 15 09:41:04 1997
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Date: Mon, 15 Sep 1997 09:39:30 -0400
To: "Christopher E. Olaes" <colaes@hercules.nhlbi.nih.gov>
From: Karl von Jena <kvj@ix.netcom.com>
Subject: Re: Growing Raid (Disk Suite)
X-Status:
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>Hi Everyone,
>
>I am curious if anyone out there has experience with
>using the raid option in DiskSuite.
>
>Here is my problem:
>I using DiskSuite there other day, and created a
>4 4GB raid system. Obviously when I mounted this
>new raid system and looked at the disk space it
>showe me that I had room for about 12GB which is
>fine, because RAID5 has a redundant disk.
>
>However, when I went to grow the raid to 5 4GB disks,
>metatool reported 15GB available, but when I mounted
>the file system, it showed me 12GB. Which I thought
>was strange.
>
>I checked the output of metastat and it said that
>4 disks were raided and 1 was Concatenated. Here
>is the output.
>
Unfortunately, DiskSuite cannot add disks to RAID5. In fact, there aren't
many packages that can. Think about it, going from 3 data blocks + 1 parity
blocks in your existing RAID to 4+1 when you add the disk is very
complicated. During the transition, the data would also be very vulnerable
to a disk failure.
Your only option is to back up the RAID, wipe it out, re-create the RAID
with the 5 drives, and restore the data. Ugly, but safe.
The smart way to add to the RAID5 is to add 5 drives at a time. Your
original RAID contains 5 drives (the optimal number for storage utilization
and performance), then the second RAID has 5 more, which is concatenated
onto the first RAID.
One piece of advice: try to be sure that each RAID only has one disk on
each SCSI chain. If your SCSI bus hangs ODS will mark all drives on it as
bad, and if you had more than one disk from your array on that SCSI chain,
it will go down. I've been there, and rebuilding/restoring 30GB of data
takes a LONG time. Live and Learn.
Karl
====================================
Karl von Jena
Publishing Systems Coordinator
The Record
150 River St.
Hackensack, NJ 07601
(201)646-4075
(201)646-4789 FAX
A bus station is where a bus stops.
A train station is where a train stops.
On my desk I have a workstation...
...any questions?
====================================
>From Matthew.Stier@tddny.fujitsu.com Sun Sep 14 11:52:26 1997
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Date: Sun, 14 Sep 1997 11:55:12 -0400
To: "Christopher E. Olaes" <colaes@hercules.nhlbi.nih.gov>
From: "Matthew Stier" <Matthew.Stier@tddny.fujitsu.com>
Subject: Re: Growing Raid (Disk Suite)
In-Reply-To: <199709140354.XAA16323@hercules.nhlbi.nih.gov>
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At 11:54 PM 9/13/97 -0400, you wrote:
>Hi Everyone,
>
>I am curious if anyone out there has experience with
>using the raid option in DiskSuite.
>
>Here is my problem:
>I using DiskSuite there other day, and created a
>4 4GB raid system. Obviously when I mounted this
>new raid system and looked at the disk space it
>showe me that I had room for about 12GB which is
>fine, because RAID5 has a redundant disk.
>
>However, when I went to grow the raid to 5 4GB disks,
>metatool reported 15GB available, but when I mounted
>the file system, it showed me 12GB. Which I thought
>was strange.
>
>I checked the output of metastat and it said that
>4 disks were raided and 1 was Concatenated. Here
>is the output.
>
>hermes{root}57% ./metastat
>d10: RAID
> State: Okay
> Interlace: 20480 blocks
> Size: 33421680 blocks
>Original device:
> Size: 25067520 blocks
> Device Start Block Dbase State Hot Spare
> c1t2d0s7 5376 No Okay
> c1t3d0s7 5376 No Okay
> c1t4d0s7 5376 No Okay
> c1t5d0s7 5376 No Okay
>Concatenated Devices:
> Size: 8355840 blocks
> Device Start Block Dbase State Hot Spare
> c1t8d0s7
>
>Does anyone know why this is, I thought I could
>grow a raid system at anytime, but all the space
>would be reported.....
>
>I have to admit, I might be growing the raid system
>wrong, if anyone has any ideas....let me know
>
>Thanks and I will summarize
>
>Chris
>--
>***************************************************************************
***
>*Christopher E. Olaes Network Administrator
*
>* National Institutes of
Health*
>*Phone (301)496-3275 10 Center Drive, MSC-1061
*
>*Beeper(301)701-4442 Building 10, Room B1D161
*
>* Bethesda, MD 20892-1061
*
>***************************************************************************
***
>
>
You can, and you did grow the RAID; However, you can only way to grow is by
concatenation. If your want the new disk to be part of RAID 5, you will
need to destroy and rebuild.
Also don't be confused between growing the RAID, and growing the
FileSystem. Once you add a new partition to a metapartition, you will need
to run 'growfs' to grow the filesystem to fill the available metapartition.
>From glenn@uniq.com.au Sun Sep 14 06:38:28 1997
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Date: Sun, 14 Sep 1997 20:42:31 +1000 (EST)
From: Glenn Satchell - Uniq Professional Services <Glenn.Satchell@uniq.com.au>
Message-ID: <199709141042.UAA04564@upstage.uniq.com.au>
To: colaes@hercules.nhlbi.nih.gov
Subject: Re: Growing Raid (Disk Suite)
X-Sun-Charset: US-ASCII
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Once yo have increased the size of the physical device (using metattach
as you have) you must then increase the size of the filesystem to this
new size using growfs.
regards,
--
Glenn Satchell glenn@uniq.com.au www.uniq.com.au |
Uniq Professional Services Pty Ltd ACN 056 279 335 | In a world with
PO Box 70, Paddington, NSW 2021, (Sydney) Australia | no fences who
Phone 02 9380 6360 Pager 016 287 000 Fax 02 9380 6416 | needs Gates?
VISIT OUR WEB SITE http://www.uniq.com.au
> From colaes@hercules.nhlbi.nih.gov Sun Sep 14 20:28:44 1997
> From: "Christopher E. Olaes" <colaes@hercules.nhlbi.nih.gov>
> Reply-to: "Christopher E. Olaes" <colaes@hercules.nhlbi.nih.gov>
> Subject: Growing Raid (Disk Suite)
> To: sun-managers@ra.mcs.anl.gov (Sun-Managers)
> Date: Sat, 13 Sep 1997 23:54:10 -0400 (EDT)
> Comment: *** You are subscribed to the connect.com.au local list exploder
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> Comment: *** NOT the actual list.
> X-Lines: 57
>
> Hi Everyone,
>
> I am curious if anyone out there has experience with
> using the raid option in DiskSuite.
>
> Here is my problem:
> I using DiskSuite there other day, and created a
> 4 4GB raid system. Obviously when I mounted this
> new raid system and looked at the disk space it
> showe me that I had room for about 12GB which is
> fine, because RAID5 has a redundant disk.
>
> However, when I went to grow the raid to 5 4GB disks,
> metatool reported 15GB available, but when I mounted
> the file system, it showed me 12GB. Which I thought
> was strange.
>
> I checked the output of metastat and it said that
> 4 disks were raided and 1 was Concatenated. Here
> is the output.
>
> hermes{root}57% ./metastat
> d10: RAID
> State: Okay
> Interlace: 20480 blocks
> Size: 33421680 blocks
> Original device:
> Size: 25067520 blocks
> Device Start Block Dbase State Hot Spare
> c1t2d0s7 5376 No Okay
> c1t3d0s7 5376 No Okay
> c1t4d0s7 5376 No Okay
> c1t5d0s7 5376 No Okay
> Concatenated Devices:
> Size: 8355840 blocks
> Device Start Block Dbase State Hot Spare
> c1t8d0s7
>
> Does anyone know why this is, I thought I could
> grow a raid system at anytime, but all the space
> would be reported.....
>
> I have to admit, I might be growing the raid system
> wrong, if anyone has any ideas....let me know
>
> Thanks and I will summarize
>
> Chris
> --
> ******************************************************************************
> *Christopher E. Olaes Network Administrator *
> * National Institutes of Health*
> *Phone (301)496-3275 10 Center Drive, MSC-1061 *
> *Beeper(301)701-4442 Building 10, Room B1D161 *
> * Bethesda, MD 20892-1061 *
> ******************************************************************************
>
>
>From robbo@box.net.au Sun Sep 14 06:14:00 1997
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Date: Sun, 14 Sep 1997 19:45:57 +0900
To: "Christopher E. Olaes" <colaes@hercules.nhlbi.nih.gov>
From: David Robson <robbo@box.net.au>
Subject: Re: Growing Raid (Disk Suite)
In-Reply-To: <199709140354.XAA16323@hercules.nhlbi.nih.gov>
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The doco that comes with 4.1 indicated to me that growing a RAID 5 device
was not recommended and is one of the downsides to RAID 5. It indicated
that it was possible but that performance would suffer. I have never tried
it though...
At 23:54 13-09-97 -0400, you wrote:
>Hi Everyone,
>
>I am curious if anyone out there has experience with
>using the raid option in DiskSuite.
>
>Here is my problem:
>I using DiskSuite there other day, and created a
>4 4GB raid system. Obviously when I mounted this
>new raid system and looked at the disk space it
>showe me that I had room for about 12GB which is
>fine, because RAID5 has a redundant disk.
>
>However, when I went to grow the raid to 5 4GB disks,
>metatool reported 15GB available, but when I mounted
>the file system, it showed me 12GB. Which I thought
>was strange.
>
>I checked the output of metastat and it said that
>4 disks were raided and 1 was Concatenated. Here
>is the output.
>
>hermes{root}57% ./metastat
>d10: RAID
> State: Okay
> Interlace: 20480 blocks
> Size: 33421680 blocks
>Original device:
> Size: 25067520 blocks
> Device Start Block Dbase State Hot Spare
> c1t2d0s7 5376 No Okay
> c1t3d0s7 5376 No Okay
> c1t4d0s7 5376 No Okay
> c1t5d0s7 5376 No Okay
>Concatenated Devices:
> Size: 8355840 blocks
> Device Start Block Dbase State Hot Spare
> c1t8d0s7
>
>Does anyone know why this is, I thought I could
>grow a raid system at anytime, but all the space
>would be reported.....
>
>I have to admit, I might be growing the raid system
>wrong, if anyone has any ideas....let me know
>
>Thanks and I will summarize
>
>Chris
>--
>***************************************************************************
***
>*Christopher E. Olaes Network Administrator
*
>* National Institutes of
Health*
>*Phone (301)496-3275 10 Center Drive, MSC-1061
*
>*Beeper(301)701-4442 Building 10, Room B1D161
*
>* Bethesda, MD 20892-1061
*
>***************************************************************************
***
>
>
--
David Robson
robbo@box.net.au
Davtin Systech Pty Ltd
>From sweh@mpn.com Sun Sep 14 06:10:27 1997
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From: Stephen Harris <sweh@mpn.com>
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Subject: Re: Growing Raid (Disk Suite)
To: colaes@hercules.nhlbi.nih.gov
Date: Sun, 14 Sep 1997 11:14:48 +0100 (BST)
In-Reply-To: <199709140354.XAA16323@hercules.nhlbi.nih.gov> from "Christopher E. Olaes" at Sep 13, 97 11:54:10 pm
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After extending the logical volume, you then need to extend the filesystem.
All the filesystem headers made with newfs all say it's a 12Gb disk. You
need to extend the filesystem so it knows about the extra disks.
I don't know the command to do this. I've not actually _used_ raid on a
Sun yet, but I read about it on the Solaris 2.6 manuals, and you have to
do the same for HPUX. Try extendfs or something...
In a recent message, Christopher E. Olaes said:
>
> Hi Everyone,
>
> I am curious if anyone out there has experience with
> using the raid option in DiskSuite.
>
> Here is my problem:
> I using DiskSuite there other day, and created a
> 4 4GB raid system. Obviously when I mounted this
> new raid system and looked at the disk space it
> showe me that I had room for about 12GB which is
> fine, because RAID5 has a redundant disk.
>
> However, when I went to grow the raid to 5 4GB disks,
> metatool reported 15GB available, but when I mounted
> the file system, it showed me 12GB. Which I thought
> was strange.
>
> I checked the output of metastat and it said that
> 4 disks were raided and 1 was Concatenated. Here
> is the output.
>
> hermes{root}57% ./metastat
> d10: RAID
> State: Okay
> Interlace: 20480 blocks
> Size: 33421680 blocks
> Original device:
> Size: 25067520 blocks
> Device Start Block Dbase State Hot Spare
> c1t2d0s7 5376 No Okay
> c1t3d0s7 5376 No Okay
> c1t4d0s7 5376 No Okay
> c1t5d0s7 5376 No Okay
> Concatenated Devices:
> Size: 8355840 blocks
> Device Start Block Dbase State Hot Spare
> c1t8d0s7
>
> Does anyone know why this is, I thought I could
> grow a raid system at anytime, but all the space
> would be reported.....
>
> I have to admit, I might be growing the raid system
> wrong, if anyone has any ideas....let me know
>
> Thanks and I will summarize
>
> Chris
> --
> ******************************************************************************
> *Christopher E. Olaes Network Administrator *
> * National Institutes of Health*
> *Phone (301)496-3275 10 Center Drive, MSC-1061 *
> *Beeper(301)701-4442 Building 10, Room B1D161 *
> * Bethesda, MD 20892-1061 *
> ******************************************************************************
>
>
rgds
Stephen
>From brisco_k@adm-srv.sat.mot.com Sun Sep 14 00:53:27 1997
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Date: Sat, 13 Sep 1997 21:55:19 -0700
From: brisco_k@adm-srv.sat.mot.com (Kris Briscoe)
Message-Id: <199709140455.VAA09441@scs014.scs.sat>
To: colaes@hercules.nhlbi.nih.gov
Subject: Re: Growing Raid (Disk Suite)
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Even though you have done a growfs, You must now do a metainit on the device you
grew.
Try that out and see what happens
kris
Kris Briscoe ( unixboy@aol.com )
Senior Unix Systems Analyst
Motorola Satcom
1.888.612.8136
THE ESSENCE OF SURVIVAL
=========================================
"Every morning in Africa, a Gazelle wakes up.
It knows it must run faster than the fastest
lion or it will be killed...Every morning a
Lion wakes up. It konw it must outrun the
slowest Gazelle or it will starve to death.
It doesn't matter whether you are a Lion or a Gazelle...
When the sun comes up, you'd better be running! "
>From sun-managers-relay@ra.mcs.anl.gov Sun Sep 14 00:23:21 1997
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From: "Christopher E. Olaes" <colaes@hercules.nhlbi.nih.gov>
Reply-To: "Christopher E. Olaes" <colaes@hercules.nhlbi.nih.gov>
Followup-To: "Christopher E. Olaes" <colaes@hercules.nhlbi.nih.gov>
Message-Id: <199709140354.XAA16323@hercules.nhlbi.nih.gov>
Subject: Growing Raid (Disk Suite)
To: sun-managers@ra.mcs.anl.gov (Sun-Managers)
Date: Sat, 13 Sep 1997 23:54:10 -0400 (EDT)
Content-Type: text
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Status: RO
Hi Everyone,
I am curious if anyone out there has experience with
using the raid option in DiskSuite.
Here is my problem:
I using DiskSuite there other day, and created a
4 4GB raid system. Obviously when I mounted this
new raid system and looked at the disk space it
showe me that I had room for about 12GB which is
fine, because RAID5 has a redundant disk.
However, when I went to grow the raid to 5 4GB disks,
metatool reported 15GB available, but when I mounted
the file system, it showed me 12GB. Which I thought
was strange.
I checked the output of metastat and it said that
4 disks were raided and 1 was Concatenated. Here
is the output.
hermes{root}57% ./metastat
d10: RAID
State: Okay
Interlace: 20480 blocks
Size: 33421680 blocks
Original device:
Size: 25067520 blocks
Device Start Block Dbase State Hot Spare
c1t2d0s7 5376 No Okay
c1t3d0s7 5376 No Okay
c1t4d0s7 5376 No Okay
c1t5d0s7 5376 No Okay
Concatenated Devices:
Size: 8355840 blocks
Device Start Block Dbase State Hot Spare
c1t8d0s7
Does anyone know why this is, I thought I could
grow a raid system at anytime, but all the space
would be reported.....
I have to admit, I might be growing the raid system
wrong, if anyone has any ideas....let me know
Thanks and I will summarize
Chris
--
******************************************************************************
*Christopher E. Olaes Network Administrator *
* National Institutes of Health*
*Phone (301)496-3275 10 Center Drive, MSC-1061 *
*Beeper(301)701-4442 Building 10, Room B1D161 *
* Bethesda, MD 20892-1061 *
******************************************************************************
--
******************************************************************************
*Christopher E. Olaes Network Administrator *
* National Institutes of Health*
*Phone (301)496-3275 10 Center Drive, MSC-1061 *
*Beeper(301)701-4442 Building 10, Room B1D161 *
* Bethesda, MD 20892-1061 *
******************************************************************************