Hello,
If I format the drive with 512+8 LBAF run fio, I don’t see any issue :
# nvme list
Node SN Model
Namespace Usage Format FW Rev
---------------- --------------------
---------------------------------------- ---------
-------------------------- ---------------- --------
/dev/nvme0n1 160401RICHC01 PM1733V4TLC
1 1.92 TB / 1.92 TB 512 B + 8 B TEMC8881
/dev/nvme1n1 160401RICHC01 PM1733V4TLC
1 1.92 TB / 1.92 TB 512 B + 8 B TEMC8881
[root@smitha-Z390-hawk tmp]# fio --filename=/dev/nvme0n1 --size=1M
--rw=write --ioengine=libaio --direct=1 --verify=crc32 --verify_dump=1
--name=test --bs=512
test: (g=0): rw=write, bs=(R) 512B-512B, (W) 512B-512B, (T) 512B-512B,
ioengine=libaio, iodepth=1
fio-3.7
Starting 1 process
test: (groupid=0, jobs=1): err= 0: pid=32631: Wed Jan 8 09:40:32 2020
read: IOPS=18.0k, BW=9481KiB/s (9709kB/s)(1024KiB/108msec)
<snip>…<snip>
write: IOPS=27.3k, BW=13.3MiB/s (13.0MB/s)(1024KiB/75msec)
Run status group 0 (all jobs):
READ: bw=9481KiB/s (9709kB/s), 9481KiB/s-9481KiB/s
(9709kB/s-9709kB/s), io=1024KiB (1049kB), run=108-108msec
WRITE: bw=13.3MiB/s (13.0MB/s), 13.3MiB/s-13.3MiB/s
(13.0MB/s-13.0MB/s), io=1024KiB (1049kB), run=75-75msec
Disk stats (read/write):
nvme0n1: ios=1288/2048, merge=0/0, ticks=67/66, in_queue=0, util=58.63%
How ever if I format the drive with LBAF type 4 that is supported by
the drive, then I get the following error :
# nvme format /dev/nvme1 --namespace-id=1 --lbaf=4 --pi=1 --ms=0
Success formatting namespace:1
# nvme list
Node SN Model
Namespace Usage Format FW Rev
---------------- --------------------
---------------------------------------- ---------
-------------------------- ---------------- --------
/dev/nvme0n1 160401RICHC01 PM1733V4TLC
1 1.92 TB / 1.92 TB 4 KiB + 64 B TEMC8881
/dev/nvme1n1 160401RICHC01 PM1733V4TLC
1 1.92 TB / 1.92 TB 4 KiB + 64 B TEMC8881
# fio --filename=/dev/nvme0n1 --size=1M --rw=write --ioengine=libaio
--direct=1 --verify=crc32 --verify_dump=1 --name=test --bs=4096
test: (g=0): rw=write, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T)
4096B-4096B, ioengine=libaio, iodepth=1
fio-3.7
Starting 1 process
fio: io_u error on file /dev/nvme0n1: Invalid or incomplete multibyte
or wide character: write offset=4096, buflen=4096
fio: pid=32709, err=84/file:io_u.c:1747, func=io_u error,
error=Invalid or incomplete multibyte or wide character
test: (groupid=0, jobs=1): err=84 (file:io_u.c:1747, func=io_u error,
error=Invalid or incomplete multibyte or wide character): pid=32709:
Wed Jan 8 09:42:12 2020
write: IOPS=2000, BW=4000KiB/s (4096kB/s)(4096B/1msec)
slat (nsec): min=12142, max=27097, avg=19619.50, stdev=10574.78
clat (nsec): min=24389, max=24389, avg=24389.00, stdev= 0.00
lat (nsec): min=52811, max=52811, avg=52811.00, stdev= 0.00
lat (usec) : 50=50.00%
cpu : usr=0.00%, sys=0.00%, ctx=2, majf=0, minf=22
latency : target=0, window=0, percentile=100.00%, depth=1
Run status group 0 (all jobs):
WRITE: bw=4000KiB/s (4096kB/s), 4000KiB/s-4000KiB/s
(4096kB/s-4096kB/s), io=4096B (4096B), run=1-1msec
Disk stats (read/write):
nvme0n1: ios=0/0, merge=0/0, ticks=0/0, in_queue=0, util=0.00%
Am I missing something?
Thanks for the help !
Smitha
