So, I borrowed a toaster, took the 3.5” drive out of its case (Seagate 2TB in an OWC case), and put in in the toaster.
It spins up, makes clicking sounds for a bit, but still doesn’t show up on the desktop =or= in Disk Utility. So, I think it’s a partition table problem. :-( Jan, I have scarcely used Terminal at all (only to launch FSCK when the OS wouldn’t launch, and a couple of other things); so I would need a detailed tutorial. Rick > On Mar 28, 2018, at 7:21 AM, David J Brooks <[email protected]> wrote: > > following this Rick. Ever since i upgraded to 10.11.6 my old PC HD is > a case is not reg by the computer asnymore > > Dave > > On Wed, Mar 28, 2018 at 6:14 AM, Jan van Wijk <[email protected]> wrote: >> Hi Rick, >> >> On Tue, 27 Mar 2018 23:04:33 -0700 Larry Colen wrote: >>> >>>> Two of my three external hard drives aren't working: One has an >>>> irreparably damaged partition map, >> >> Irreparable by what, 'Disk Utiliy' ? >> Do you know what filesystem was used, was it HFS (macOS specific) or perhaps >> simply FAT32? >> >>> and another (my main external drive) has its light blink for a few seconds >>> and click, but doesn't show up at all. >> >> Does not show up in the Finder I guess, but not in Disk Utility either? >> >> The Finder will not see it if there is no mountable filesystem found, >> perhaps due to damaged partition tables, >> it is quite possible that the Disk Utilty still sees it, meaning the USB >> connection and drive are at least working. >> >>>> Could the crashing i/o card on the old Mini have damaged these drives? Is >>>> there any way to repair the one that's not showing up at all? >> >> Hard to say without further analysis, if it does not show up ANYWHERE (Disk >> Utility, other disk-tools) >> then it is likely to be a problem with the disk hardware, or perhaps the >> USB-enclosure ... >> >> >>> My guess is that they are USB drives? Spinny drives? >>> >>> Are they powered from the wall or over the USB cable? >>> >>> Can the drives be removed from their case and read directly as SATA drives? >> >> Good suggestion, but not so easily done. Not sure if the mac-mini has extra >> SATA ports ? >> (I have only used and older iMac and a 2013 macBook pro sofar, so not >> familiar with it) >> >>> I haven't done that level of programming on USB and/or hard drives, but >>> while I could see a partition map being splattered by random writes, it's >>> hard to imagine physical damage to hard drive itself. >> >> Indeed. >> >> Partition tables (MBR, and parts of GPT ones too) are close to the start of >> the disk, >> and that is the most likely area to get damaged when programs go astray ... >> >> >>> Something like this and some good disk recovery software might solve your >>> issues: >>> http://www.kingwin.com/storage/docking-stations/ezd-2535/ >> >> Indeed, I have a similar one ... >> >>> Or just move the hard drives to different cases and see if a different >>> USB<->SATA controller does a better job. >>> >>> In the short term, get another external drive so you don't mess things up >>> irreperably. >> >> Yes, good advice. >> >> If the data on the drives is valuable at all (meaning no other backups) >> you should make a copy (clone) of the disk, then attempt repair or >> file recovery from that copy ... >> >>> To be extra safe, you could try getting a couple of docks/cases, then maybe >>> use dd to make a direct copy of your old drive to your new drive, then try >>> to repair the partition table on the new drive. >> >> Right, with chances of the drives being damaged, perhaps use 'ddrescue' >> instead (to be downloaded, use google) >> >> >> If you are somewhat comfortable using the commandline, you could also try my >> own multiplatform >> disk-tool that can do an analysis of the disk, and search for missing >> partitions (MGR or GPT style) >> using the 'Analyse disks for support' menu item in the 'scripts' menu. >> >> It is text-mode, and runs in the macOS Console, but DOES have a menu system. >> I have assisted in dozens of partition-recoveries over the years using this >> tool. >> >> You need to install it from a ZIP-archive, then run a 'setup' script to set >> the permissions right, >> and create some symlinks and then run it with ROOT privileges (for example >> by using 'sudo') >> which will be done automatically if you use the 'dfs' symlinked script. >> >> You can download the installation ZIP from my website: >> >> https://www.dfsee.com/dfsee/download.php >> >> Make sure to read the '/doc/dfsinst.txt' from that archive for further >> installation tips, >> look for the Linux/OS-X section. >> >> >> I'll be available for further assistance if you choose to go this route ... >> >> >> Regards, JvW >> >> >> >> ------------------------------------------------------------------ >> Jan van Wijk; http://www.dfsee.com >> Flickr : jvw_pentax >> >> >> -- >> PDML Pentax-Discuss Mail List >> [email protected] >> http://pdml.net/mailman/listinfo/pdml_pdml.net >> to UNSUBSCRIBE from the PDML, please visit the link directly above and >> follow the directions. > > > > -- > Documenting Life in Rural Ontario. > www.caughtinmotion.com > http://brooksinthecountry.blogspot.com/ > York Region, Ontario, Canada > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
