On 09/06/15 20:46, Wols Lists wrote: > Please expand! Having read the article, it doesn't seem to say anything > more than what is repeated time and time on this list - MAKE SURE YOUR > DRIVES ARE DECENT RAID DRIVES. Large RAID5 arrays are a bad idea because of the probability of unrecoverable read errors occurring during a rebuild, which increases with the size of the array. Decent RAID drives will have better reliability than indecent-ones (haha), but in absolute terms their URE rates are still going to increase with array size. > If you have ERC, then the odd "soft" read error doesn't matter. If you > don't have ERC, then your data is at risk when you replace a drive, and > it doesn't matter how big your drives are, it's the array size that matters. Indeed. Pierre was proposing to further increase the size of his RAID5 array, and I was advising him against it because of the above. -- 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
