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I accidentally deleted the partition table of a 1.5TB drive with about 10 partitions on it; I'm running testdisk now but it's going to take a while to scan everything.

I do have some useful information which I'm hoping can speed things up - the partition layout and filesystem types (mostly NTFS, some FAT32, EXT3/4). Unfortunately there are a few unknowns with the partition sizes. I do have another disk with a backup of (most) of the partitions, but there may still be some unknowns.

Is there any way to use the information I do have to speed up the partition table recovery, or do I just need to wait for the exhaustive scan to finish?

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up vote 1 down vote accepted

No - not recommended, can cause irretrievable data loss

Unless you have all the information fdisk -l provides, you shouldn't attempt this. Just knowing the filesystems isn't going to help much (yet); the start and end are what matter most.

Let testdisk run and take its own time -- it usually does a very good job.

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