TiVo Community Forums Archives - Mistake on new B Drive

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Mistake on new B Drive
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Posted by: traveller104

I went to add a new B drive to my Tivo.

It is a 120GB drive, but it came up as 33GB in BIOS. But I issued the mfsadd -x /dev/hdc /dev/hdb command anyway.

I got the computer BIOS to recognize the drive as 120GB now, but I can't figure out how to get the missing 80GB for Tivo.

I have not placed my drives back into the Tivo yet.

How do I remove the B drive and add it again as 120GB or How do I get the 33GB increased to 120GB?

What happens if you place only the Drive A back in the Tivo without the B?

Thanks in Advance!

Posted by: Robert S

The A drive will no longer work without the B drive.

I would think running mfsadd again will add the extra space.

Posted by: traveller104

I issued another MFSADD -x /dev/hdb but it came back saying nothing to add and the same amount of space available.

Posted by: Robert S

You always run any of the MFS Tools commands against BOTH drives in a two-drive set.

Posted by: traveller104

hda = Primary Drive A 120GB
hdc = Drive B 120GB

# mfsadd -x /dev/hda /dev/hdc
Current Estimated Standalone Size : 167 Hours
Nothing to Add!
#

This is what I get.

Posted by: Robert S

How strange. Check again that the drives are being recognised as the correct sizes (you're looking for a line that says something like 120,000Mb, not 120Gb).

Also, what does mfsinfo /dev/hda /dev/hdc say?

Posted by: traveller104

Drives both show as 120xxxMb

mfsinfo reports:

It has hda partitions and then

hdc2 0MiB
hdc3 32252MiB

Total 146231MiB
167 Hours
Can be expanded 2 more times

Posted by: Robert S

Yes, we do see this sometimes, although I don't recall seeing anyone get out of it. The problem appears to be that because the A drive is full, mfsadd thinks it can't expand.

I don't see how your position is different from dd'ing a 30Gb B drive on to a 120Gb and then expanding it. Someone did that successfully earlier today.

mfsadd can add partitions manually - you'd use pdisk to rebuild the partition table and then create a new pair of MFS partititions and then invoke mfsadd in a way that tells it that those are the partitions you want to add (it's in the README). I have a vague recollection of someone trying this and it not working.

Other than that, I think your only way forward is to restore a backup. You should be able to make a fresh compressed backup from this drive set, in which case your SP's and /possibly/ your recordings will survive.

Posted by: traveller104

I used pdisk to delete the partition map on the B drive, then I restored my image to drive A and then ran mfsadd on them both, and now I have the full 270 Hours.

Thanks for your help!