On 12/13/23 15:33, gene heskett wrote:
gene@coyote:~$ time dd if=/dev/zero of=/home/gene/zero bs=1M count=100
oflag=sync
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 0.935655 s, 112 MB/s
real 0m0.940s
user 0m0.000s
sys 0m0.254s
Thank you for providing a console session that confirms the issue is not
md RAID.
For completeness, I suggest that you do both write and read benchmarks:
2023-12-13 17:56:58 root@taz ~
# smartctl -i /dev/sda | grep "Device Model"
Device Model: INTEL SSDSC2CW060A3
2023-12-13 17:57:12 root@taz ~
# dd if=/dev/zero of=/home/dpchrist/100mb.zero bs=1M count=100 oflag=sync
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 1.6329 s, 64.2 MB/s
2023-12-13 17:57:57 root@taz ~
# free && sync && echo 3 > /proc/sys/vm/drop_caches && free
total used free shared buff/cache
available
Mem: 32698252 1941032 29428472 761160 1328748
29606508
Swap: 976892 0 976892
total used free shared buff/cache
available
Mem: 32698252 1941516 29580404 717360 1176332
29650836
Swap: 976892 0 976892
2023-12-13 17:58:03 root@taz ~
# dd of=/dev/null if=/home/dpchrist/100mb.zero bs=1M count=100 oflag=sync
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 0.263723 s, 398 MB/s
I have found that as I run computers, there is an accumulation of cruft
over time. The more I mess with a computer, the sooner it becomes
unstable. Eventually, "finding the needle in the haystack" and
"putting Humpty Dumpty back together again" do not work -- the computer
requires a backup-wipe-install-restore cycle. Your posts indicate that
your computer is overdue.
And, I suspect a deeper issue -- you have one computer that is your
workstation, your file server, and your backup server. This
over-complicates everything and creates a strong disincentive to
backup-wipe-install-restore. I have been there, done that, lost
service, and lost data. Now I have several laptops/ desktops/
workstations, a dedicated file server, and a dedicated backup server.
Life is good. :-)
Again -- I suggest that you build a backup server, then build a file
server, then rebuild the workstation. I am confident you will be
rewarded with simpler administration and improved reliability.
David
