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.
