For 68k/ppc machines backup I use DAT drives and/or MO disks. Even older DAT drives can backup the whole HD of a 68K/early ppc and do it pretty fast using native SCSI and software. Mostly once I get a machine setup like I like it I just image the drive to tape to have incase I hose something up. All drivers and disk images are dumped onto my server which gets archived once in a while using DDS4 or AIT2 drives. It would be faster just to mirror a server drive with an external USB2 drive and put it on the shelf. I kick myself for not getting more 2TB HDs when they were under $70 before the flooding tripple prices for HDs.
There are more modern ways of doing backup, but I like using the older tech (which is dirt cheap anyway) with old machines. I just find the older tape drives interesting , same with removable carts. I have a bunch of WORM drives for my old IBM PS/2 systems (talk about pricey equipment back in the day) you can access in DOS. QIC drives are very reliable (before Travan anyway), and who doesn't like Syquest and Bournouli drives? I also dabble in DLT drives plus the million CDRW drives I have (quite a few SCSI externals which I seem to get in any larger hauls I find). You can fit a whole 68k driver archive on one 1.3GB MO disk.
There are more modern ways of doing backup, but I like using the older tech (which is dirt cheap anyway) with old machines. I just find the older tape drives interesting , same with removable carts. I have a bunch of WORM drives for my old IBM PS/2 systems (talk about pricey equipment back in the day) you can access in DOS. QIC drives are very reliable (before Travan anyway), and who doesn't like Syquest and Bournouli drives? I also dabble in DLT drives plus the million CDRW drives I have (quite a few SCSI externals which I seem to get in any larger hauls I find). You can fit a whole 68k driver archive on one 1.3GB MO disk.