Am 28.07.2010 23:11, schrieb Roman Mamedov: > That drive is most likely a Seagate, and if so, there's nothing to worry > about. Literally every Seagate drive will have a high value in > Hardware_ECC_Recovered, it's just a peculiarity of their SMART. Other vendors' > drives recover read errors using ECC too, but don't report that into the SMART > metric. Yep, it's a Seagate. All four are Seagate: sda, sdb: ST3250310NS (should have ERC as far as I found online) sdc, sdd: ST3250621NS (still don't know if they have ERC) I now decided to run that check-action on all three arrays. So far it looks good. All three arrays re-synced OK, without any drive failing. Good :-) Still no reallocated sectors on all four drives. "Current_Pending_Sector" and "Offline_Uncorrectable" on /dev/sdb still at the old value of "13". Do you think I should swap that drive or not? (added difficulty: that server is around 400km from me ... I would have to direct an employee there to swap the hdd ...) Migrating to RAID6, sure, would make sense, but this would need a kernel-upgrade and involves quite some work. Right now I have 2.6.25-gentoo-r7 there :-( thank you all for your replies, Stefan -- 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