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Thread: Raid 5 disk failure and repair

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Raid 5 disk failure and repair
Noncentz303 28.06.2007 14:40:07
Ok we are running a SBS with 6 physical disks in it, poweredge server. We are
using Raid 5 with the 0,1 harddrives being our OS drives while the others for
redundancy. Well our 4 HD faulted last night but instead of continuing on as
usual the whole machine went down???? on a drive that didnt hold an OS on it.
When I rebooted I got the error WINDOWS/SYSTEM/CONFIG file missing or
corrupt.

- got a new drive, ran a rebuild, ran a restore.... good to go

Has anyone had this happen to them before ???? I would love to test this
RAID setup if possible (i didnt set it up)
Re: Raid 5 disk failure and repair
Holz <none[ at ]none.com> 28.06.2007 14:57:20
On Thu, 28 Jun 2007 07:40:07 -0700, Noncentz303 wrote:

[Quoted Text]
> Has anyone had this happen to them before ???? I would love to test this
> RAID setup if possible (i didnt set it up)

I saw it happen only on Dell the built in RAID, got rid of it and running
only HP. Depending on the size of the drives and C, I would image the C
drive, change the raid to be mirror for the boot and 5 for the data. or If
yo have enough space, put one drive as stand by


--
The next version of Windows? Windows piñata
Piñatas are made from easily breakable materials. a bright container
surrounded by blindfolded children breaking the
piñata in order to collect the candy inside of it.
Re: Raid 5 disk failure and repair
"Charlie Russel - MVP" <charlie[ at ]mvKILLALLSPAMMERSps.org> 28.06.2007 15:02:26
It is unclear from what you describe, but I _think_ what you said was:

You have a 6 disk Hardware RAID 5 array.
You have created "disks" at the hardware level that you then see in SBS
where you have a Mirror in software?

Bad idea, if that's what you're doing.

I'd be more inclined to use 2 of the 6 drives as a hardware RAID-1 mirror,
and the other 4 as RAID-5. This all happens at the hardware, RAID controller
level. Your C: drive sits on the RAID-1 mirror, while a D: drive sits on the
RAID-5.

An alternative is to use all 6 drives as RAID-5. Partition them at the
hardware level as one big disk, then create two or more partitions in
Windows - one for the OS and one or more for the rest. If a drive fails, you
should continue to run, though slowly, until the replacement is in and the
array fully rebuilt.

--
Charlie.
http://msmvps.com/xperts64
http://mvp.support.microsoft.com/profile/charlie.russel


"Noncentz303" <Noncentz303[ at ]discussions.microsoft.com> wrote in message
news:9F224AAE-F7AC-45D1-AF7C-B9F2E5BB1601[ at ]microsoft.com...
[Quoted Text]
> Ok we are running a SBS with 6 physical disks in it, poweredge server. We
> are
> using Raid 5 with the 0,1 harddrives being our OS drives while the others
> for
> redundancy. Well our 4 HD faulted last night but instead of continuing on
> as
> usual the whole machine went down???? on a drive that didnt hold an OS on
> it.
> When I rebooted I got the error WINDOWS/SYSTEM/CONFIG file missing or
> corrupt.
>
> - got a new drive, ran a rebuild, ran a restore.... good to go
>
> Has anyone had this happen to them before ???? I would love to test this
> RAID setup if possible (i didnt set it up)

Re: Raid 5 disk failure and repair
"Dave Nickason [SBS MVP]" <gwdibble[ at ]NOSPAM.frontiernet.net> 28.06.2007 16:54:38
Or run 5 drives as a RAID 5 with a hot spare.

I've been running Dell PE2xxx servers since 2000 and I've had a pretty good
number of drives fail, on a variety of models and RAID controllers. All
that generally happens is that they fail over to the hot spare (if you've
got one). Then when you get the new drive, you remove the dead drive in
Open Manage, pop in the new drive, and configure the new one as the hot
spare.

Without a hot spare, you'd just do the Open Manage thing and let the
controller rebuild the array on the new drive. Either way, the only time I
had any user awareness of the situation was a few years ago when I hot
swapped a drive and the controller didn't recognize it. For that one, the
server was down long enough to reboot so the controller would see the new
drive.


"Charlie Russel - MVP" <charlie[ at ]mvKILLALLSPAMMERSps.org> wrote in message
news:D6C2FF98-7722-4BDB-992E-9502DEDF084C[ at ]microsoft.com...
[Quoted Text]
> It is unclear from what you describe, but I _think_ what you said was:
>
> You have a 6 disk Hardware RAID 5 array.
> You have created "disks" at the hardware level that you then see in SBS
> where you have a Mirror in software?
>
> Bad idea, if that's what you're doing.
>
> I'd be more inclined to use 2 of the 6 drives as a hardware RAID-1 mirror,
> and the other 4 as RAID-5. This all happens at the hardware, RAID
> controller level. Your C: drive sits on the RAID-1 mirror, while a D:
> drive sits on the RAID-5.
>
> An alternative is to use all 6 drives as RAID-5. Partition them at the
> hardware level as one big disk, then create two or more partitions in
> Windows - one for the OS and one or more for the rest. If a drive fails,
> you should continue to run, though slowly, until the replacement is in and
> the array fully rebuilt.
>
> --
> Charlie.
> http://msmvps.com/xperts64
> http://mvp.support.microsoft.com/profile/charlie.russel
>
>
> "Noncentz303" <Noncentz303[ at ]discussions.microsoft.com> wrote in message
> news:9F224AAE-F7AC-45D1-AF7C-B9F2E5BB1601[ at ]microsoft.com...
>> Ok we are running a SBS with 6 physical disks in it, poweredge server. We
>> are
>> using Raid 5 with the 0,1 harddrives being our OS drives while the others
>> for
>> redundancy. Well our 4 HD faulted last night but instead of continuing on
>> as
>> usual the whole machine went down???? on a drive that didnt hold an OS on
>> it.
>> When I rebooted I got the error WINDOWS/SYSTEM/CONFIG file missing or
>> corrupt.
>>
>> - got a new drive, ran a rebuild, ran a restore.... good to go
>>
>> Has anyone had this happen to them before ???? I would love to test this
>> RAID setup if possible (i didnt set it up)
>


Re: Raid 5 disk failure and repair
"Charlie Russel - MVP" <charlie[ at ]mvKILLALLSPAMMERSps.org> 28.06.2007 17:12:44
yes, a hot spare is a useful way to go when you can afford the space. But
lately I've been leaning more towards RAID-6. Instead of a hot spare that is
not protecting you until it's rebuilt, you have a full redundancy even after
a single failure. This gives you more flexibility in when you schedule the
rebuild for, since rebuilding a drive _does_ impact the speed of the array.

--
Charlie.
http://msmvps.com/xperts64
http://mvp.support.microsoft.com/profile/charlie.russel


"Dave Nickason [SBS MVP]" <gwdibble[ at ]NOSPAM.frontiernet.net> wrote in message
news:etd2EUauHHA.668[ at ]TK2MSFTNGP05.phx.gbl...
[Quoted Text]
> Or run 5 drives as a RAID 5 with a hot spare.
>
> I've been running Dell PE2xxx servers since 2000 and I've had a pretty
> good number of drives fail, on a variety of models and RAID controllers.
> All that generally happens is that they fail over to the hot spare (if
> you've got one). Then when you get the new drive, you remove the dead
> drive in Open Manage, pop in the new drive, and configure the new one as
> the hot spare.
>
> Without a hot spare, you'd just do the Open Manage thing and let the
> controller rebuild the array on the new drive. Either way, the only time
> I had any user awareness of the situation was a few years ago when I hot
> swapped a drive and the controller didn't recognize it. For that one, the
> server was down long enough to reboot so the controller would see the new
> drive.
>
>
> "Charlie Russel - MVP" <charlie[ at ]mvKILLALLSPAMMERSps.org> wrote in message
> news:D6C2FF98-7722-4BDB-992E-9502DEDF084C[ at ]microsoft.com...
>> It is unclear from what you describe, but I _think_ what you said was:
>>
>> You have a 6 disk Hardware RAID 5 array.
>> You have created "disks" at the hardware level that you then see in SBS
>> where you have a Mirror in software?
>>
>> Bad idea, if that's what you're doing.
>>
>> I'd be more inclined to use 2 of the 6 drives as a hardware RAID-1
>> mirror, and the other 4 as RAID-5. This all happens at the hardware, RAID
>> controller level. Your C: drive sits on the RAID-1 mirror, while a D:
>> drive sits on the RAID-5.
>>
>> An alternative is to use all 6 drives as RAID-5. Partition them at the
>> hardware level as one big disk, then create two or more partitions in
>> Windows - one for the OS and one or more for the rest. If a drive fails,
>> you should continue to run, though slowly, until the replacement is in
>> and the array fully rebuilt.
>>
>> --
>> Charlie.
>> http://msmvps.com/xperts64
>> http://mvp.support.microsoft.com/profile/charlie.russel
>>
>>
>> "Noncentz303" <Noncentz303[ at ]discussions.microsoft.com> wrote in message
>> news:9F224AAE-F7AC-45D1-AF7C-B9F2E5BB1601[ at ]microsoft.com...
>>> Ok we are running a SBS with 6 physical disks in it, poweredge server.
>>> We are
>>> using Raid 5 with the 0,1 harddrives being our OS drives while the
>>> others for
>>> redundancy. Well our 4 HD faulted last night but instead of continuing
>>> on as
>>> usual the whole machine went down???? on a drive that didnt hold an OS
>>> on it.
>>> When I rebooted I got the error WINDOWS/SYSTEM/CONFIG file missing or
>>> corrupt.
>>>
>>> - got a new drive, ran a rebuild, ran a restore.... good to go
>>>
>>> Has anyone had this happen to them before ???? I would love to test this
>>> RAID setup if possible (i didnt set it up)
>>
>
>

Re: Raid 5 disk failure and repair
"Russ Grover \(SBITS.Biz\)" <support[ at ]REMOVETHIS.SBITS.Biz> 28.06.2007 17:51:47
I'd concur with Russel, I don't really know what his configuration is from
the description?
Since he mentions RAID 5 then 0 and 1 as a OS Which Sounds like RAID1?

Noncentz303
It almost sounds like, you have two drives RAID1 and 4 Drives RAID5?
????

Russ



--

Russell Grover
SBITS.Biz
Microsoft Certified Small Business Specialist.
MCP, MCPS, MCNPS, (MCP-SBS)
support [ at ] SBITS.Biz
Remote SBS2003 Support
http://www.SBITS.Biz


"Charlie Russel - MVP" <charlie[ at ]mvKILLALLSPAMMERSps.org> wrote in message
news:D6C2FF98-7722-4BDB-992E-9502DEDF084C[ at ]microsoft.com...
[Quoted Text]
> It is unclear from what you describe, but I _think_ what you said was:
>
> You have a 6 disk Hardware RAID 5 array.
> You have created "disks" at the hardware level that you then see in SBS
> where you have a Mirror in software?
>
> Bad idea, if that's what you're doing.
>
> I'd be more inclined to use 2 of the 6 drives as a hardware RAID-1 mirror,
> and the other 4 as RAID-5. This all happens at the hardware, RAID
> controller level. Your C: drive sits on the RAID-1 mirror, while a D:
> drive sits on the RAID-5.
>
> An alternative is to use all 6 drives as RAID-5. Partition them at the
> hardware level as one big disk, then create two or more partitions in
> Windows - one for the OS and one or more for the rest. If a drive fails,
> you should continue to run, though slowly, until the replacement is in and
> the array fully rebuilt.
>
> --
> Charlie.
> http://msmvps.com/xperts64
> http://mvp.support.microsoft.com/profile/charlie.russel
>
>
> "Noncentz303" <Noncentz303[ at ]discussions.microsoft.com> wrote in message
> news:9F224AAE-F7AC-45D1-AF7C-B9F2E5BB1601[ at ]microsoft.com...
>> Ok we are running a SBS with 6 physical disks in it, poweredge server. We
>> are
>> using Raid 5 with the 0,1 harddrives being our OS drives while the others
>> for
>> redundancy. Well our 4 HD faulted last night but instead of continuing on
>> as
>> usual the whole machine went down???? on a drive that didnt hold an OS on
>> it.
>> When I rebooted I got the error WINDOWS/SYSTEM/CONFIG file missing or
>> corrupt.
>>
>> - got a new drive, ran a rebuild, ran a restore.... good to go
>>
>> Has anyone had this happen to them before ???? I would love to test this
>> RAID setup if possible (i didnt set it up)
>


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