Check data consistency before and after the SSD is powered on

[huangyu96]

The SSD is powered off during data writing. After recovery, verify the data.
The first picture,128 iodepth failed.
The second picture,iodepth_batch_complete_min=0, the actual iodepth is equal to 1, although successful, but the performance is too poor, is there any parameter or method can efficiently verify the data?

[sitsofe]

@huangyu96 Is this actually two questions?

(Please attach text or text documents rather than screenshots - it makes easier)

1. Are you saying that verification shouldn't have failed?
2. Verification is slow.

For 1. it's hard to say what's going on because you didn't include the write job that created the data.

For 2:

• What speed do you get with a pure read job that is identical other than not doing verification?
• I notice you're using crc32. Are your speeds better with crc32c (which is more likely to be hardware accelerated)?