Hello, (More details at http://bugzilla.kernel.org/show_bug.cgi?id=8816 ) My home server disk doesn't work with latest kernels since its size is reported or probed correctly. With 2.6.22.1 I get: Probing IDE interface ide1... hdd: ST340823A, ATA DISK drive hdd: selected mode 0x42 ... hdd: max request size: 128KiB hdd: Host Protected Area detected. current capacity is 78165360 sectors (40020 MB) native capacity is 78165361 sectors (40020 MB) hdd: Host Protected Area disabled. hdd: 78165361 sectors (40020 MB) w/1024KiB Cache, CHS=65535/16/63, UDMA(33) hdd: cache flushes not supported hdd: hdd1 hdd2 hdd3 hdd: dma_intr: status=0x51 { DriveReady SeekComplete Error } hdd: dma_intr: error=0x10 { SectorIdNotFound }, LBAsect=78165360, sector=78165360 ide: failed opcode was: unknown hdd: dma_intr: status=0x51 { DriveReady SeekComplete Error } hdd: dma_intr: error=0x10 { SectorIdNotFound }, LBAsect=78165360, sector=78165360 ide: failed opcode was: unknown hdd: dma_intr: status=0x51 { DriveReady SeekComplete Error } hdd: dma_intr: error=0x10 { SectorIdNotFound }, LBAsect=78165360, sector=78165360 ... And as said shows in bugzilla, badblocks, fsck and smartctl think the drive is not broken or going to die too soon. What's the difference between the size formats of WIN_READ_NATIVE_MAX_EXT read by ide-disk.c/idedisk_read_native_max_address_ext() and (hdreg.h) hd_driveid->lba_capacity_2 read by, if I read drivers/ide/* code correctly, ide-probe.c/do_identify()? If this disk is reporting one of these wrong, which fix could be applied? Both disabling 'stroke' and removing addr++ in ide-disk.c/idedisk_read_native_max_address*() fix the problem, but if kernel code is correct and standard compliant, these fixes are out of the question. Perhaps a boot parameter to kernel could force the disk sector count to some value for buggy drives? -Mikko - To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html