Hi gents,
I’m on version Dragonfish-24.04.0 (the hw in the signature)
I just changed the main pool disks. from 2 TB to 6TB.
I observed the disks are super slow. I am copying 50 GB from one location to the other on the same pool and I get a ridiculous speed: around 4 MB/s
Advanced Power Management for all disks is set to Level 254 (max performance)
Is there a setting I am missing out?
thank you
What disks do you use exactly?
Sounds like an SMR problem.
all 6 are supposed to be non SMR HDDs
model: ST6000VN006-2ZM186
the write speed is super slow. read is fine as it uses the cache.
dd if=/dev/zero of=./test bs=512k count=2048 oflag=direct
2048+0 records in
2048+0 records out
1073741824 bytes (1.1 GB, 1.0 GiB) copied, 23.9221 s, 44.9 MB/s
dd if=./test of=/dev/zero bs=512k count=2048
2048+0 records in
2048+0 records out
1073741824 bytes (1.1 GB, 1.0 GiB) copied, 0.230011 s, 4.7 GB/s
dd if=./test of=/dev/zero bs=512k count=2048
2048+0 records in
2048+0 records out
1073741824 bytes (1.1 GB) copied, 0.152424 s, 7.0 GB/s
