On 5/3/2010 4:27 PM, Martin K. Petersen wrote: > We have means of obtaining alignment and physical sector size > information from both SCSI and ATA drives. But only if the drive > firmware provides the information, of course. How? I don't see any such information in the output of hdparm -I for instance. > One currently shipping drive model on the market isn't reporting the > bigger physical block size. But there are several other 4KB sector > products out there that are working just fine. The WD drive indeed reports a 512 byte sector size, but I also have an SSD with a 512kb erase block size and it seems like these knobs were intended to cover that as well, but again, the values exported by the kernel in /sys are 0 and I don't see a way for the drive to report this information to the kernel. -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
