quick question on what to expect with first parity sync. I have 2x4tb ironwolf drives from before in my hp gen8 microserver - both for data + 1TB cache ssd.
I now added 2x8tb smr (seagate barracudas). Over the night I transferred my media to the new 8tb drive (cca 2tb in 14h) and today I added a parity drive. Now, I do understand (or thought I do) problems of SMR drives, but creating of the parity is going extremely slow - it made 215GB in last 3 and a half hours. Transfer speeds started with 100MB/s+ and are now between 3-15. Am I doing something wrong? Going through the forums I understood that sequential writes should not have such a penalty.
I did extended smart test during the night before and both of them looked fine as well...
When I first encountered the issue, I cancelled the parity sync after an hour and changed bios setting to sata ahci and enabled cache in bios, but it does not seem to have done any difference .
Adding diagnostics here if someone catches anything.
Again, I understand the speed limitations of re-writing the data in daily use, but this seems excessive.
6.9.2 Initial Parity sync extremely slow with new SMR drive
in General Support
Posted
Hey guys
quick question on what to expect with first parity sync. I have 2x4tb ironwolf drives from before in my hp gen8 microserver - both for data + 1TB cache ssd.
I now added 2x8tb smr (seagate barracudas). Over the night I transferred my media to the new 8tb drive (cca 2tb in 14h) and today I added a parity drive. Now, I do understand (or thought I do) problems of SMR drives, but creating of the parity is going extremely slow - it made 215GB in last 3 and a half hours. Transfer speeds started with 100MB/s+ and are now between 3-15. Am I doing something wrong? Going through the forums I understood that sequential writes should not have such a penalty.
I did extended smart test during the night before and both of them looked fine as well...
When I first encountered the issue, I cancelled the parity sync after an hour and changed bios setting to sata ahci and enabled cache in bios, but it does not seem to have done any difference .
Adding diagnostics here if someone catches anything.
Again, I understand the speed limitations of re-writing the data in daily use, but this seems excessive.
atlas-diagnostics-20210429-2012.zip