On 2/25/23, to...@tuxteam.de <to...@tuxteam.de> wrote: > I can't make too much heads or tails of it, but I'd focus > my suspicions on the USB part. USB ports (both sides), > cable and especially the power source for the disk: does > it have a separate source, or does it feed on the computer's > USB?
the drive has its own power cable and those kinds of failures have actually happened in research rooms in libraries, which are rented by VIPs for their own conferences ...; so, I doubt those electrical outlets are also failing On 2/25/23, David Christensen <dpchr...@holgerdanske.com> wrote: > It looks like your USB connection is unreliable. I suggest removing the > drive from its USB enclosure ... I am not using a USB enclosure per se, but a regular internal disk externally attached using a USB/power interface. I will test the USB cabling using a better looking, newer USB cable. > Unless you have suitable test equipment If what you meant by "test equipment" is the kind they use in clean rooms I cannot use those, but I would like to buy some hdd failure detection rig to be sure the kinds of failures I encounter are not physical and when physical I would like to be able to differentiate between an actual failing drive and a failure somehow externally induced (which you would test using a Debian live start and making sure the BIOS hasn’t been corrupted). There is a lot of (at times partial and in ads) information out there about the science and art of the use and care of computer memory (RAM, SSD and hdd) and filesystems based on the profile of your applications but a "Bible" kind of book about such matters is nowhere to be found. The laptop + external disk combination I am using right now has a very pore transfer rate. I need at least three times that around 100MB/sec: $ date; time sudo hdparm -tT /dev/sdc Sat 25 Feb 2023 12:03:43 PM UTC /dev/sdc: Timing cached reads: 29458 MB in 2.00 seconds = 14754.70 MB/sec Timing buffered disk reads: 112 MB in 3.04 seconds = 36.87 MB/sec real 0m14.048s user 0m0.274s sys 0m1.862s $ I wonder about how much better transfer rates can you get in a DIY way on Linux. Thank you, lbrtchx
