TiVo Community Forums Archives - trouble upgrading A+B->A+B

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trouble upgrading A+B->A+B
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Posted by: gigageek

I've got a Sony SVR-2000 (hacked March 2001 with Dylan's Boot Disk & BlessTiVo) with a Maxtor 30GB (30736MB) A-drive and a Maxtor 80GB (81968MB) B-drive. I purchased two Seagate 80GB (80020MB) Barracuda ATA IV drives to replace them, and I planned to use MFSTools 2.0 (with -s 127).

In Hinsdale's How-To, I got to step 10, config #5, option #1:
# mfsbackup -Tao - /dev/hda /dev/hdb | mfsrestore -s 127 -xzpi - /dev/hdc /dev/hdd

This gives the following output:

Scanning source drive. Please wait a moment.
Source drive size is 30 hours
- Upgraded to 117 hours
Uncompressed backup size: 95681 megabytes
Restore failed. Unable to fit backup onto drives.

I tried without -x in the mfsrestore, but got the same results. Both the BIOS and Linux kernel recognize the actual size of all the drives (within a couple of MB, anyway). I do want to preserve my recordings.

Thinking that my (combined) 160GB upgrade drives are bigger than the (combined) 110GB old drives, I was not expecting this problem. I didn't see where Hinsdale's How-To says this won't work, and the multiple-drive syntax on the command line suggests that it would. I fear my interpretation may have been mistaken.

I REALLY like the Seagate drives because they're dead-nuts silent from 3 feet away (with the case on the TiVo, anyway) and quiet is more important to me than recording capacity. Unfortunately, the Seagate Barracuda ATA IV drives don't exist in sizes greater than 80GB. :(

Is there any way for me to do this upgrade with my two Seagate 80GB drives and still save my recordings (there are only about 10-15 hours of them)? Or do each of the drives individually have to be larger than the drives they replace?

Many TIA.

Posted by: Robert S

We've go another thread running with the same question.

In that case, I suggested the following.

Instead of -Ta, which takes all recordings, try using -l (that's an L, whose idea was Arial anyway?) with a large threshold value. It looks like this gives you a divorced backup that can be redistributed on the restore side.

I'm not sure if mfstool can identify deleted recordings. If not, you might have to pack your 'empty' space with long, Best Quality recordings that will be above the -l threshold.

edit

It looks like -l 4000 -sTo might be a good start.

Posted by: gigageek

I tried:
# mfsbackup -l 4000 -sTo - /dev/hda /dev/hdb | mfsrestore -s 127 -xzpi - /dev/hdc /dev/hdd

This gives the following output:

Scanning source drive. Please wait a moment.
Source drive size is 30 hours
- Upgraded to 117 hours
Backup image will be 117 hours
Uncompressed backup size: 95681 megabytes
Restore failed. Unable to fit backup onto drives.

Do I need different parameters for mfsrestore, also?

Posted by: gigageek

If the other thread is:

http://www.tivocommunity.com/tivo-v...&threadid=73447

then let's not duplicate that one here. I will post my situation in that thread and leave this one alone.