![]() These 2 volumes were created with the installation of Catalina. “Catalina APFS volume - Data” (my nickname for this). “Catalina APFS” volume (my nickname for this). On the left side of “Disk Utility” you will see a list broken down into 3 sections. This process should reset “Disk Utility” so that it opens properly. My process begins by fixing “Disk Utility” so it will show the Apple sparsebundle disk image along with Time Capsule backups enabled.įirst of all, If your “Disk Utility” doesn’t open you should do a computer restart holding down the “Option Key”. I have an Airport Time Capsule which combines Time Machine with a Wifi Network. On my iMac this drive is called the macOS Base System. Even cooler is I can just do incremental snapshots if I complete one step of the repair process, I can snapshot it so I don't need to repeat it again if I screw up further down the road.First I made sure the external drive stick used for dosdudes Catalina program was plugged in. If I screw anything up, I can immediately revert back to the initial snapshot and try again, no need to re-image the original disk. Snapshots on zvols + iSCSI has been a godsend for repairing disks with corrupted filesystems once I create the initial image and dump it into a zvol, I snapshot the zvol, then export the zvol via iSCSI so I can run Windows-only tools against it from Windows. ZFS snapshots offer a similar capability for shared storage. Windows still lacks a good "mount disk image" function (other than ISO images) but if it had one sparse files could easily be done on Windows too, and as I've shown Linux has ways to do it. ![]() Many virtual machine solutions use a similar technique both VHD and VMDK support sparse disks as well as differencing disks (where only the changes relative to a source disk are recorded).īasically, the technology is hardly "proprietary", Apple just added some nice usability on top of it. You can create a sparse file, put a filesystem on it (use the mkfs tool of choice) and then mount it (loopback mount). Linux generally won't automatically deallocate zeroed blocks, but you can use fallocate -d to do that manually. On Linux you can create a sparse file using truncate (the filesystem has to support it, ext4 does for sure and I'm pretty sure ZFS does, not sure if ntfs-3g implements it but NTFS does support it too). ![]() Mac just basically puts a layer on top of this so you can mount them natively. You can have a file that appears to be a certain size, but most of its blocks are unallocated (and if read return sectors full of 0x00 bytes). Just make sure to tag the post with the flair and give a little background info/context.Īs far as I know, sparsebundles are just the Mac equivalent of "sparse files" on Linux. On Fridays we'll allow posts that don't normally fit in the usual data-hoarding theme, including posts that would usually be removed by rule 4: “No memes or 'look at this '” We are not your personal archival army.No unapproved sale threads, advertisement posts, or giveaways.No memes or 'look at this old storage medium/ connection speed/purchase' (except on Free Post Fridays).Search the Internet, this subreddit and our wiki before posting.R/DataHorader 2013-2023 Searchable Archives Historic Reddit Archives & Download Tools, Etc.ģ.3v Pin Reset Directions :D / Alt Imgur link And we're trying really hard not to forget. Along the way we have sought out like-minded individuals to exchange strategies, war stories, and cautionary tales of failures. Everyone has their reasons for curating the data they have decided to keep (either forever or For A Damn Long Timetm). ![]() government or corporate espionage), cultural and familial archivists, internet collapse preppers, and people who do it themselves so they're sure it's done right. Among us are represented the various reasons to keep data - legal requirements, competitive requirements, uncertainty of permanence of cloud services, distaste for transmitting your data externally (e.g.
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