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awarded  Supporter
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comment Ssd TRIM/DISCARD details
Thanks, this was very helpful.
Feb
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accepted Ssd TRIM/DISCARD details
Feb
7
comment Ssd TRIM/DISCARD details
TRIM does more than just tell the GC not to move TRIMmed blocks. Those blocks, since they once contained meaningful data, will have to be reset to zero by the GC at some point. If the blocks are already in their ground state (logical 0/physical 1), does the GC still attempt to erase them or does it recognize there is no need?
Feb
7
comment Ssd TRIM/DISCARD details
I believe the logical bits are inverted from the physical ones. If you restore a drive with safe erase or whatever, and run hexdump, you'll see only 0's. One of my questions is actually about whether a block of zeros (or physical 1's) which was previously used and released by the filesystem will be written directly to, although the drive thinks it still contains non-trivial (i.e. used in a file) data.
Feb
7
comment Ssd TRIM/DISCARD details
I am using raid 0 and the script is for trimming the raid array (mdadm).
Feb
7
asked Ssd TRIM/DISCARD details
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Feb
3
revised mdadm LBA mapping
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