On Tue, 30 Nov 2010 13:40:25 +0300 CoolCold <coolthecold@xxxxxxxxx> wrote: > On Tue, Nov 30, 2010 at 3:52 AM, Neil Brown <neilb@xxxxxxx> wrote: > > When you write 512 byte blocks to a block device, it will read a 4096 byte > > block, update the 512 bytes, and write the 4096 bytes back. > > > > > >> > >> Which gives rise to this: > >> > >> [325487.740650] ata2.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0 > >> [325487.740746] ata2.00: irq_stat 0x00060002, device error via D2H FIS > >> [325487.740841] ata2.00: failed command: READ DMA > > > > Yep. read error while trying to pre-read the 4K block. > Hmm, is true for any block device? i.e. if blockdev --getss reports > sector size is 512 byte. Or this is related to page size? > PAGE_SIZE. NeilBrown -- 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
