By the way do you think it could be a bug of libata's SATL anyway? Like perhaps it should break a single unmap request to multiple ATA commands? I am not totally sure about it but it looks like there's a limit of addressed blocks in a single ATA DSM/TRIM command (4 bytes, which is 65535). On 21 June 2015 at 15:03, Tom Yan <tom.ty89@xxxxxxxxx> wrote: > On 21 June 2015 at 08:20, Martin K. Petersen <martin.petersen@xxxxxxxxxx> wrote: >> It is a SATA-attached drive, it has no block limits VPD. What you are >> seeing is information prepared by libata's SATL. >> >> Because if the vendor got these trivial values wrong there is little to >> no chance that they implemented discard correctly in their firmware. > > I don't get it. So there's a chance that the VPDs is not purely from > the hardware? Then how can I differentiate them? But then you said > "the vendor got these trivial values wrong", so were you talking about > this drive or just for real SCSI drives? -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in
