On 9/6/19 9:43 PM, ToddAndMargo via users wrote:
On 9/6/19 9:36 PM, Cameron Simpson wrote:
On 06Sep2019 20:16, ToddAndMargo <toddandma...@zoho.com> wrote:
On 9/6/19 7:45 PM, Cameron Simpson wrote:
# dd status=progress bs=4096 if=/dev/sdb | gzip > DeadStick.FC30.2019-09-06
34489798656 bytes (34 GB, 32 GiB) copied, 404 s, 85.4 MB/s
dd: error reading '/dev/sdb': Input/output error
8425692+0 records in
8425692+0 records out
34511634432 bytes (35 GB, 32 GiB) copied, 459.17 s, 75.2 MB/s

That was on my USB 3.1 port.

Not sure this is a problem. How big is /dev/sdb? What do you expect dd to do when it hits the end of the drive?

It is 64 GB.

Ah, badness then as you say.

Had you tried ddrescue, a dd-like command with an ability to step past bad areas and proceed with the rest?

Cheers,
Cameron Simpson <c...@cskk.id.au>

Trying it right now.  Had to drop the if= and of=.

Thank you for all the help!

More evidence of badness!

# ddrescue /dev/sdb DeadStick.FC30_2019-09-06.dd
GNU ddrescue 1.23
Press Ctrl-C to interrupt
     ipos:   40491 MB, non-trimmed:    2725 MB,  current rate:       0 B/s
     opos:   40491 MB, non-scraped:        0 B,  average rate:    140 MB/s
non-tried:   23666 MB,  bad-sector:        0 B,    error rate:    301 MB/s
  rescued:   37768 MB,   bad areas:        0,        run time:      4m 27s
pct rescued:   58.86%, read errors:    41633,  remaining time:         n/a
                              time since last successful read:          1s
Copying non-tried blocks... Pass 5 (forwards)
ddrescue: Input file disappeared: No such file or directory


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