On 8/1/2013 9:01 PM, Roberto Spadim wrote: > other point is... swap have a badblock feature? i think it's not > linux-raid but linux-vm or something like it... > for example if i'm using a disk and swap find a badblock, it will use > it? does swap handle bad blocks? I believe you're thinking of "mkswap -c": "Check the device (if it is a block device) for bad blocks before creating the swap area. If any are found, the count is printed." This simply tells you if bad blocks are found during mkswap, and how many. It doesn't tell you the locations of the blocks nor attempt to remap them. It's informational only. Remedial action is left to the user. I'm not aware of any code in the mm or block layer that transparently handles bad block management, nor code that simply tracks bad blocks to avoid using them. If there were such a patch, it would not apply simply to swap, but to the entire block layer. I've not heard of any such thing in recent development. If this was included in the block layer you'd surely have seen emails about it on the linux-raid list, as the current md code that deals with bad blocks would have needed rewriting to interface with any new generic interface in the block layer. So if you're worried about your swap partition sitting on potentially bad blocks you'll want to have one form or another of redundant md device sitting under that swap partition. However, you stated you're using enterprise class drives. These are usually pretty good about remapping bad blocks on the fly, and have much larger reserved block pools than consumer drives for remapping use, so this may simply be a non-issue. -- Stan -- 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
