Thank you very much, Bruce. I neglected to mention that there are three “baskets.” Two are Seagate Slims which I rotate for A&B storage at my son’s place. You’ve given me great ideas for rounding out my strategy.
Al Poulin > On Aug 20, 2021, at 3:44 AM, imaclist@googlegroups.com wrote: > > imaclist@googlegroups.com > <https://groups.google.com/forum/?utm_source=digest&utm_medium=email#!forum/imaclist/topics> > Google Groups > <https://groups.google.com/forum/?utm_source=digest&utm_medium=email/#!overview> > > <https://groups.google.com/forum/?utm_source=digest&utm_medium=email/#!overview> > > Topic digest <> > View all topics > <https://groups.google.com/forum/?utm_source=digest&utm_medium=email#!forum/imaclist/topics> > Safeguarding Volumes <x-msg://1/#group_thread_0> - 2 Updates > <>Safeguarding Volumes > <http://groups.google.com/group/imaclist/t/56464b324889b725?utm_source=digest&utm_medium=email> > > Al Poulin <alfred.pou...@gmail.com>: Aug 19 04:42PM -0400 > > I would like to reformat an external hard drive at the media level, hopefully > to salvage it for another few years. It contains three CCC volumes that I > want to safeguard. A fourth volume has corrupted files. What is the best > procedure? All volumes are formatted Journaled HFS Plus, NOT APFS. > > As I understand it, Disk Utility First Aid > > I use Carbon Copy Cloner to backup four computers to the external drive as > bootable clones. Each CCC volume resides in its own partition. The volume for > my main computer has corrupted files which have not been resolved by > reformatting that volume singly with Disk Utility Erase and then cloning > anew. I want the clones to remain bootable. > > Can I simply drag each volume to another media, to either my iMac’s internal > drive or another external drive? Would I need to create separate partitions > for each volume? Otherwise, should the volumes be set into disk images? > Bombich (CCC vendor) recommends using disk images “sparingly.” Then, would I > update each disk image in subsequent clones, or would I “Restore” each volume > to permit updating the clones? > > Thanks for any guidance. > > Al Poulin > "Bruce Johnson" <john...@pharmacy.arizona.edu>: Aug 19 09:02PM > > On Aug 19, 2021, at 1:42 PM, Al Poulin > <alfred.pou...@gmail.com<mailto:alfred.pou...@gmail.com>> wrote: > > I would like to reformat an external hard drive at the media level, hopefully > to salvage it for another few years. It contains three CCC volumes that I > want to safeguard. A fourth volume has corrupted files. What is the best > procedure? All volumes are formatted Journaled HFS Plus, NOT APFS. > > As I understand it, Disk Utility First Aid > > I use Carbon Copy Cloner to backup four computers to the external drive as > bootable clones. Each CCC volume resides in its own partition. The volume for > my main computer has corrupted files which have not been resolved by > reformatting that volume singly with Disk Utility Erase and then cloning > anew. I want the clones to remain bootable. > > Having all the volumes on one physical disk is a ‘all your eggs in one > basket’ and that basket is starting to fall apart...file corruption that is > NOT fixed by fixed by reformatting and restoring a volume on a partition is > very often indicative of hardware failure impending. (unless the corrupted > files are ALSO corrupted on your main computer, in which case your backup is > faithfully doing it’s thing.) > > What is cheaper to replace: a hard drive? or your data? That’s always the > most relevant question to ask in these cases. > > > Can I simply drag each volume to another media, to either my iMac’s internal > drive or another external drive? > > I would use CCC to copy each volume from the multi-partition drive to a new > HDD for each one. Ideally more than one copy, and then stored in separate > physical locations. If they’re small volumes, you can use SSD’s..ssd’s are > quite reliable now and if you’re backing up small volumes little ones are > pretty inexpensive. 120 gb ones can be had for around $20) Heck depending on > the size, you might get away with USB sticks… > > For archival purposes SSDs are pretty good. > > Would I need to create separate partitions for each volume? Otherwise, should > the volumes be set into disk images? Bombich (CCC vendor) recommends using > disk images “sparingly.” Then, would I update each disk image in subsequent > clones, or would I “Restore” each volume to permit updating the clones? > > I would not use disk images. > > > > -- > Bruce Johnson > University of Arizona > College of Pharmacy > Information Technology Group > > Institutions do not have opinions, merely customs > Back to top <x-msg://1/#digest_top> > You received this digest because you're subscribed to updates for this group. > You can change your settings on the group membership page > <https://groups.google.com/forum/?utm_source=digest&utm_medium=email#!forum/imaclist/join>. > To unsubscribe from this group and stop receiving emails from it send an > email to imaclist+unsubscr...@googlegroups.com > <mailto:imaclist+unsubscr...@googlegroups.com>. -- You received this message because you are a member of the iMac Group, a group for those using Apple iMacs and eMacs. 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