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scancount=1 engine=8.12.0-2505160000 definitions=main-2507290036 X-Proofpoint-ORIG-GUID: 4GuB37Mh1Ev1_ee413tuDmQAtT8PuTRT X-Proofpoint-GUID: 4GuB37Mh1Ev1_ee413tuDmQAtT8PuTRT X-Authority-Analysis: v=2.4 cv=QZtmvtbv c=1 sm=1 tr=0 ts=68885793 b=1 cx=c_pps a=e1sVV491RgrpLwSTMOnk8w==:117 a=e1sVV491RgrpLwSTMOnk8w==:17 a=6eWqkTHjU83fiwn7nKZWdM+Sl24=:19 a=z/mQ4Ysz8XfWz/Q5cLBRGdckG28=:19 a=lCpzRmAYbLLaTzLvsPZ7Mbvzbb8=:19 a=wKuvFiaSGQ0qltdbU6+NXLB8nM8=:19 a=Ol13hO9ccFRV9qXi2t6ftBPywas=:19 a=xqWC_Br6kY4A:10 a=Wb1JkmetP80A:10 a=GoEa3M9JfhUA:10 a=V92dLS6141j04T72YdUA:9 cc=ntf awl=host:13604 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwNzI5MDAzNiBTYWx0ZWRfX4xSnSniUfPX/ 0APgQbfnyKeColWLRwlCnmpzUJNljNqqiQjR08ikZQw80Gu6oaA+tVbPEVx7m/OEYuf8MFein/5 gaEZxs3Ap5V8vudJclGYhJ/Ggdsc2kh1G7DFCc7g5IreKU80NfAVC0LDarZmfJSG97B3yjeZuye fQuc0u8yY95IB5+hQF+Vyp4ZoX4wxuwgsCIhZR/y5loMuJzEoZBNtl3Mi2YNAFKg9GL0kYqqYid HSkhBgi+pvVNv0hFgS+AkjauFmwEq25oWBNN1/3FuvI4gTdzA0Po4tvqVNQU3tPnfyuGr98tXvf pX/YroMEMrM2ZTTW2kmmBHBi9blb/agHn7Eu/mk0jd6p1ckb8uxgTVKUoxCRk0/65zKobIbNDUr fOowPK0xh6qkkmP4ek5IaTAMH2LhEmzB1OzDhyhcZGEPNyjc+sh2irD7q1Agemk0lJBrSTHt Hi Kurt! > The SCSI disk driver (sd_mod) would just claim that discard is not > supported. It's not true. The NVMes support it as do the enclosures. For some definition of support at least. If they can't figure out how to set a single bit flag to enable the feature, then maybe their "support" is not entirely trustworthy. But great that it works... What are your devices actually reporting in: # sg_readcap -l /dev/sdN # sg_vpd -p bl /dev/sdN # sg_vpd -p lbpv /dev/sdN ? > I have a few, though all have variants of RTL9210 chips. > > But sd was too conservative to let me do it. Why not just have a udev rule which does: echo unmap > /sys/class/scsi_disk/H:C:T:L/provisioning_mode ? Substitute "writesame_10" or "writesame_16" depending on what is actually implemented. -- Martin K. Petersen