RAID disks = PITA in more ways than one

  • Thread starter Thread starter 116e32s
  • Start date Start date
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116e32s

I tried to install Centos 7 on an old PC that had Vista on it.
But installer did not detect any disks. Drove me mad for hours.
Eventually I found out this PC originally had RAID mirror on it.
One of the drives shat itself, so owner carried on using one disk,
just by deselecting RAID in BIOS, and Windows Vista would still boot.
Now when a RHEL 7 derivative linux glimpses RAID signature at start of a
hard drive, it will do a Sargeant Schultz "I see nothing".
Previous versions of Centos would tell you it was RAID a member,
but not the new 7.
 
I tried to install Centos 7 on an old PC that had Vista on it.
But installer did not detect any disks. Drove me mad for hours.
Eventually I found out this PC originally had RAID mirror on it.
One of the drives shat itself, so owner carried on using one disk,
just by deselecting RAID in BIOS, and Windows Vista would still boot.
Now when a RHEL 7 derivative linux glimpses RAID signature at start of a
hard drive, it will do a Sargeant Schultz "I see nothing".
Previous versions of Centos would tell you it was RAID a member,
but not the new 7.
Click to expand...

You should be able to replace the MBR on the partition with a non-RAID
type, without losing data.

Yousuf Khan
 
You should be able to replace the MBR on the partition with a non-RAID
type, without losing data.
Click to expand...

Write zeroes to the entire drive (use dd), acts like a low-level format,
freshens up any weak blocks too.

Example: "dd if=/dev/zero bs=4k of=/dev/sdX" where X if the drive selector.

Do this from the installer command line (Slackware can) or use a live CD.

Grant.
 
Write zeroes to the entire drive (use dd), acts like a low-level format,
freshens up any weak blocks too.

Example: "dd if=/dev/zero bs=4k of=/dev/sdX" where X if the drive selector.

Do this from the installer command line (Slackware can) or use a live CD.
Click to expand...

Except, I thought he was trying to preserve data? What you suggest he do
will overwrite all data including metadata completely.

Yousuf Khan
 
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