Even for a spinning disk that seems really slow, especially if it is rated for USB3.0. I haven’t played with spinning disks in years, but IIRC I was getting 30-40 MB/s writes.
This drive sounds similar to yours and is advertised at a max of 220 MB/s. Even half that speed would be quite good. https://www.bestbuy.com/site/seagate-backup-plus-fast-4tb-external-usb-3-0-portable-hard-drive-black/5127078.p?skuId=5127078 Regards, - Robert On Fri, Jul 15, 2022 at 1:22 PM Mark Phillips <[email protected]> wrote: > Found the problem....I got a rotational drive, not ssd. > > Mark > > On Fri, Jul 15, 2022, 12:15 PM Mark Phillips <[email protected]> > wrote: > > > Disks benchmarks 1/2 way done. > > > > Showing > > Avg read 2.3 MB/sec > > Avg write 1.8 MB/sec > > Avg access time 450 msec > > > > Does this seem slow for a seagate 4tb USB 3 external drive? > > > > Mark > > > > On Fri, Jul 15, 2022, 11:53 AM Mark Phillips <[email protected] > > > > wrote: > > > >> It may be a cockpit error. The USB drive is brand new, and I assumed > >> formatted to vfat. It turns out it is ntfs. I reformatted the drive to > >> ext4, and I am running benchmarks. > >> > >> Initial results from hdparm (on a different machine - SurfacePro 4 > >> running Ubuntu > >> Timing cache reads: 9598.53 MB/sec > >> Buffered disk reads: 6.47 MB/sec > >> > >> Waiting for disks benchmark on the target machine. > >> > >> Mark > >> > >> On Fri, Jul 15, 2022, 10:21 AM Robert Citek <[email protected]> > >> wrote: > >> > >>> Indeed, that sounds really slow: > >>> > >>> ( 138GB * 1000MB/GB ) / (26hr * 60min/hr * 60s/min ) = 1.5 MB/s ~ 12 > >>> Mbps > >>> > >>> That's in the USB1.x range. If you use USB3.0 and can get 100MB/s > write > >>> speed, you'd be done in about 6 hours. > >>> > >>> Have a look at hdparm to get some info on read/write performance of > your > >>> drive: > >>> > >>> > >>> > https://linuxconfig.org/hard-drive-speed-test-using-linux-command-line-and-hdparm > >>> > >>> Good luck and let us know what you discover. > >>> > >>> Regards, > >>> - Robert > >>> > >>> > >>> > >>> On Fri, Jul 15, 2022 at 10:48 AM Michael Ewan <[email protected] > > > >>> wrote: > >>> > >>> > Are you using a USB3 drive and a USB3 port, the speed of the > interface > >>> is > >>> > what I would think of first. > >>> > > >>> > On Fri, Jul 15, 2022 at 8:41 AM Mark Phillips < > >>> [email protected]> > >>> > wrote: > >>> > > >>> > > I have an Ubuntu 18.04 system with two drives in an lvm with one > >>> logical > >>> > > root partition. I am trying to back up the contents of the drives > >>> (ie /) > >>> > to > >>> > > an external usb drive using rsync. It is taking a really long time. > >>> After > >>> > > 26 hours of continuous operation I have only transferred 138 GB out > >>> of 2+ > >>> > > TB, so I am looking at about 16 days to complete the transfer. > >>> > > > >>> > > My rsync command is: > >>> > > sudo rsync --no-compress --info=progress2 -avAXEWSlHh > >>> > > > >>> > > > >>> > > >>> > --exclude={'/run','/mnt','/swapfile','/boot','/dev','/proc','/sys','/run','/mnt','/media','/lost+found','/swapfile.extended','/tmp'} > >>> > > / '/media/mark/Seagate Portable > Drive/tsunami-backups-Jul_13_17-39/' > >>> > > > >>> > > Any suggestions on how I can speed this up and not lose any data? > >>> > > > >>> > > Thanks! > >>> > > > >>> > > Mark > >>> > > > >>> > > >>> > >> >
