Hello! Many thanks to Eric for describing here and in his previous email the bug I experienced using bcache on SSDs formatted as 4k sectors. Thanks also to him for explaining to me that all I had to do was reformat the SSDs into 512-byte sectors to easily get around the bug. > I'm not sure how to format it 4k, but this is how Frédéric set it to 512 > bytes and fixed his issue: > > # intelmas start -intelssd 0 -nvmeformat LBAFormat=0 Right. To format an Intel NVMe P3700 back to 4k sectors, the command is as follows: # intelmas start -intelssd 0 -nvmeformat LBAFormat=3 > The parameter LBAformat specifies the sector size to set. Valid options are in the range from index 0 to the number of supported LBA formats of the NVMe drive, however the only sector sizes supported in Intel® NVMe drives are 512B and 4096B which corresponds to indexes 0 and 3 respectively. Source: https://www.intel.com/content/www/us/en/support/articles/000057964/memory-and-storage.html Oddly enough the user manual for the intelmass application [1] (formerly isdct) forgets to specify the possible values to be given to the LBAformat argument, which makes it much less useful. :-) Regards, Frédéric. [1] https://www.intel.com/content/www/us/en/download/19520/intel-memory-and-storage-tool-cli-command-line-interface.html -- Frédéric Dumas f.dumas@xxxxxxxxxxxxxxxxx
