#2885 Issue closed: USB formatting is really slow

Labels: support / question, not ReaR / invalid, special hardware or VM

ZENAdmin-Ops opened issue at 2022-11-02 03:46:

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  • ReaR version ("/usr/sbin/rear -V"):

  • OS version ("cat /etc/os-release" or "lsb_release -a" or "cat /etc/rear/os.conf"):
    Ubuntu 22.04

  • ReaR configuration files ("cat /etc/rear/site.conf" and/or "cat /etc/rear/local.conf"):

  • Hardware vendor/product (PC or PowerNV BareMetal or ARM) or VM (KVM guest or PowerVM LPAR):

  • System architecture (x86 compatible or PPC64/PPC64LE or what exact ARM device):

  • Firmware (BIOS or UEFI or Open Firmware) and bootloader (GRUB or ELILO or Petitboot):

  • Storage (local disk or SSD) and/or SAN (FC or iSCSI or FCoE) and/or multipath (DM or NVMe):


  • Description of the issue (ideally so that others can reproduce it):

Same issue as described in issue

lusb - t
produces no output?

I would like to identify a way to improve the speed of the formatting.

Is there a quickformat option for instance?

With Windows you can select quickformat,
which does not scan the target disk for bad sectors
and is many times quicker than a "standard" format.

  • Workaround, if any:
    This is what I'm looking for.

  • Attachments, as applicable ("rear -D mkrescue/mkbackup/recover" debug log files):

To paste verbatim text like command output or file content,
include it between a leading and a closing line of three backticks like

verbatim content

DEvil0000 commented at 2022-11-03 12:36:

this depends on:

  • the device and bus speed
  • the partition size
  • the filesystem used

for some filesystems there are parameters to speed this up but then it takes longer later when writing. so there is a tradeoff.
I am sure parameters can get tuned but this is normally not the step taking long. In my case about 20s for a 64GB usb stick.

[Export of Github issue for rear/rear.]