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I am unable to mirror 2 disks. Here is my setup:
2 Physical SCSI disks. Both 36 GB. No onboard RAID controller.
Disk 0 - Dynamic. Has C: and D:. Both NTFS, both Simple. Partition Style:
MBR
I am trying to fully mirror disk 0 onto disk 1. If I right-click on either
the C: or D: partitions, the option to 'Add Mirror' exists, but I cannot
mirror them both!
Here is another odd thing: Both physical hard drives show slightly
different sizes. Disk 0 shows 33.91 GB. Disk 1 Shows 33.79 GB.
Can anyone help?
Thanks
PM
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Are both disks the exact same model and firmware rev? A different drive
firmware revision could make the drives look different to the system.
In any case you are probably right that you would only be able to mirror one
partition or the other if the second drive reports being smaller. If you
have no other option you might need to backup the server and restore it to
drive 1, and then make it drive 0. Then you should be able to mirror them.
"PM" <PM[ at ]discussions.microsoft.com> wrote in message
news:101C0B98-A8C2-4D43-876D-E56D548BC381[ at ]microsoft.com...
[Quoted Text] >I am unable to mirror 2 disks. Here is my setup:
>
> 2 Physical SCSI disks. Both 36 GB. No onboard RAID controller.
>
> Disk 0 - Dynamic. Has C: and D:. Both NTFS, both Simple. Partition
> Style:
> MBR
>
> I am trying to fully mirror disk 0 onto disk 1. If I right-click on
> either
> the C: or D: partitions, the option to 'Add Mirror' exists, but I cannot
> mirror them both!
>
> Here is another odd thing: Both physical hard drives show slightly
> different sizes. Disk 0 shows 33.91 GB. Disk 1 Shows 33.79 GB.
>
> Can anyone help?
>
> Thanks
> PM
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Interesting. So basically, with my current setup, I SHOULD be able to mirror
the drives, correct?
"Steve Gould" wrote:
[Quoted Text] > Are both disks the exact same model and firmware rev? A different drive > firmware revision could make the drives look different to the system. > > In any case you are probably right that you would only be able to mirror one > partition or the other if the second drive reports being smaller. If you > have no other option you might need to backup the server and restore it to > drive 1, and then make it drive 0. Then you should be able to mirror them. > > "PM" <PM[ at ]discussions.microsoft.com> wrote in message > news:101C0B98-A8C2-4D43-876D-E56D548BC381[ at ]microsoft.com... > >I am unable to mirror 2 disks. Here is my setup: > > > > 2 Physical SCSI disks. Both 36 GB. No onboard RAID controller. > > > > Disk 0 - Dynamic. Has C: and D:. Both NTFS, both Simple. Partition > > Style: > > MBR > > > > I am trying to fully mirror disk 0 onto disk 1. If I right-click on > > either > > the C: or D: partitions, the option to 'Add Mirror' exists, but I cannot > > mirror them both! > > > > Here is another odd thing: Both physical hard drives show slightly > > different sizes. Disk 0 shows 33.91 GB. Disk 1 Shows 33.79 GB. > > > > Can anyone help? > > > > Thanks > > PM > > > |
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Did you accidentally convert disk 1 to GPT? If so, you should revert it back
to MBR so the disks are the same size.
If you want to check to see if it's a GPT disk, you can go to a command line
and type DISKPART. In the diskpart prompt, issue a 'list disks' command. In
the far right column, if there's an asterisks present, then you're looking
at a GPT disk.
Regards,
John
Visit my blog: http://msmvps.com/blogs/jtoner
"PM" <PM[ at ]discussions.microsoft.com> wrote in message
news:101C0B98-A8C2-4D43-876D-E56D548BC381[ at ]microsoft.com...
[Quoted Text] > I am unable to mirror 2 disks. Here is my setup:
>
> 2 Physical SCSI disks. Both 36 GB. No onboard RAID controller.
>
> Disk 0 - Dynamic. Has C: and D:. Both NTFS, both Simple. Partition
Style:
> MBR
>
> I am trying to fully mirror disk 0 onto disk 1. If I right-click on
either
> the C: or D: partitions, the option to 'Add Mirror' exists, but I cannot
> mirror them both!
>
> Here is another odd thing: Both physical hard drives show slightly
> different sizes. Disk 0 shows 33.91 GB. Disk 1 Shows 33.79 GB.
>
> Can anyone help?
>
> Thanks
> PM
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In article <101C0B98-A8C2-4D43-876D-E56D548BC381[ at ]microsoft.com>,
PM[ at ]discussions.microsoft.com says...
[Quoted Text] > I am unable to mirror 2 disks. Here is my setup:
>
> 2 Physical SCSI disks. Both 36 GB. No onboard RAID controller.
>
> Disk 0 - Dynamic. Has C: and D:. Both NTFS, both Simple. Partition Style:
> MBR
>
> I am trying to fully mirror disk 0 onto disk 1. If I right-click on either
> the C: or D: partitions, the option to 'Add Mirror' exists, but I cannot
> mirror them both!
>
> Here is another odd thing: Both physical hard drives show slightly
> different sizes. Disk 0 shows 33.91 GB. Disk 1 Shows 33.79 GB.
>
> Can anyone help?
The disk you want to make a mirror has to be larger or have more free
space, you can not mirror a 33.9GB disk to a 33.8GB disk.
Google for RAID and read up on it.
--
Leythos
- Igitur qui desiderat pacem, praeparet bellum.
- Calling an illegal alien an "undocumented worker" is like calling a
drug dealer an "unlicensed pharmacist"
spam999free[ at ]rrohio.com (remove 999 for proper email address)
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OK I did as you suggested, and now BOTH disks show exactly the same size,
which is good. However, I STILL cannot mirror more than one of the 2
partitions. After I mirror one, the option to mirror the other is greyed
out. ANy other options?
"John Toner [MVP]" wrote:
[Quoted Text] > Did you accidentally convert disk 1 to GPT? If so, you should revert it back > to MBR so the disks are the same size. > > If you want to check to see if it's a GPT disk, you can go to a command line > and type DISKPART. In the diskpart prompt, issue a 'list disks' command. In > the far right column, if there's an asterisks present, then you're looking > at a GPT disk. > > Regards, > John > > Visit my blog: http://msmvps.com/blogs/jtoner> > "PM" <PM[ at ]discussions.microsoft.com> wrote in message > news:101C0B98-A8C2-4D43-876D-E56D548BC381[ at ]microsoft.com... > > I am unable to mirror 2 disks. Here is my setup: > > > > 2 Physical SCSI disks. Both 36 GB. No onboard RAID controller. > > > > Disk 0 - Dynamic. Has C: and D:. Both NTFS, both Simple. Partition > Style: > > MBR > > > > I am trying to fully mirror disk 0 onto disk 1. If I right-click on > either > > the C: or D: partitions, the option to 'Add Mirror' exists, but I cannot > > mirror them both! > > > > Here is another odd thing: Both physical hard drives show slightly > > different sizes. Disk 0 shows 33.91 GB. Disk 1 Shows 33.79 GB. > > > > Can anyone help? > > > > Thanks > > PM > > > |
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John:
I did as you suggested but am still only able to mirror one disk at a time.
After I mirror one of them, the 'Add Mirror' option greys out of the list on
the other one. Both disks look identical in every way.
"John Toner [MVP]" wrote:
[Quoted Text] > Did you accidentally convert disk 1 to GPT? If so, you should revert it back > to MBR so the disks are the same size. > > If you want to check to see if it's a GPT disk, you can go to a command line > and type DISKPART. In the diskpart prompt, issue a 'list disks' command. In > the far right column, if there's an asterisks present, then you're looking > at a GPT disk. > > Regards, > John > > Visit my blog: http://msmvps.com/blogs/jtoner> > "PM" <PM[ at ]discussions.microsoft.com> wrote in message > news:101C0B98-A8C2-4D43-876D-E56D548BC381[ at ]microsoft.com... > > I am unable to mirror 2 disks. Here is my setup: > > > > 2 Physical SCSI disks. Both 36 GB. No onboard RAID controller. > > > > Disk 0 - Dynamic. Has C: and D:. Both NTFS, both Simple. Partition > Style: > > MBR > > > > I am trying to fully mirror disk 0 onto disk 1. If I right-click on > either > > the C: or D: partitions, the option to 'Add Mirror' exists, but I cannot > > mirror them both! > > > > Here is another odd thing: Both physical hard drives show slightly > > different sizes. Disk 0 shows 33.91 GB. Disk 1 Shows 33.79 GB. > > > > Can anyone help? > > > > Thanks > > PM > > > |
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Does the same thing happen if you try it the other way? Create the
partitions on the 2nd disk and then mirror back to the 1st. If this works, I
would guess that your disks are not quite identical. You should check out
the capacity of each disk and make sure that these are the same...just
because Disk Manager reports that disks are the same size does not mean that
they are exactly the same. If one disk is 1 kb too small, the disk will not
mirror.
Regards,
John
Visit my blog: http://msmvps.com/blogs/jtoner
"PM" <PM[ at ]discussions.microsoft.com> wrote in message
news:8E57F47E-2BAB-4D39-AB30-1A0D879A7424[ at ]microsoft.com...
[Quoted Text] > John:
>
> I did as you suggested but am still only able to mirror one disk at a
time.
> After I mirror one of them, the 'Add Mirror' option greys out of the list
on
> the other one. Both disks look identical in every way.
>
> "John Toner [MVP]" wrote:
>
> > Did you accidentally convert disk 1 to GPT? If so, you should revert it
back
> > to MBR so the disks are the same size.
> >
> > If you want to check to see if it's a GPT disk, you can go to a command
line
> > and type DISKPART. In the diskpart prompt, issue a 'list disks' command.
In
> > the far right column, if there's an asterisks present, then you're
looking
> > at a GPT disk.
> >
> > Regards,
> > John
> >
> > Visit my blog: http://msmvps.com/blogs/jtoner
> >
> > "PM" <PM[ at ]discussions.microsoft.com> wrote in message
> > news:101C0B98-A8C2-4D43-876D-E56D548BC381[ at ]microsoft.com...
> > > I am unable to mirror 2 disks. Here is my setup:
> > >
> > > 2 Physical SCSI disks. Both 36 GB. No onboard RAID controller.
> > >
> > > Disk 0 - Dynamic. Has C: and D:. Both NTFS, both Simple. Partition
> > Style:
> > > MBR
> > >
> > > I am trying to fully mirror disk 0 onto disk 1. If I right-click on
> > either
> > > the C: or D: partitions, the option to 'Add Mirror' exists, but I
cannot
> > > mirror them both!
> > >
> > > Here is another odd thing: Both physical hard drives show slightly
> > > different sizes. Disk 0 shows 33.91 GB. Disk 1 Shows 33.79 GB.
> > >
> > > Can anyone help?
> > >
> > > Thanks
> > > PM
> >
> >
> >
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