#554794 concerns the time it takes to run badblocks for any particular value of the -c option (count of blocks to do at once).
At the time (2009) it wasn't clear if larger values of -c improved runtime, although one user (in 2011) reports 10% improvement. The current -c (block count) default is 64 blocks. The current -b (block size) default is 1024 bytes. AFAICT the last time they were increased was 2004 (#232240, -c from 16 to 64). A related bug (#764636) when running badblocks on a 14tb device was solved by switching to -b 4096. Given the device size increases and RAM/CPU improvements since all these things occurred, is there any value to increasing the defaults? Does anyone have any data? If not then what tests would be valuable? I often run many badblocks instances at once on separate SATA devices (so no bus contention), what are the optimal settings for that case? Thanks, -- Matt Taggart tagg...@debian.org
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