Questions · Site data updated
A Drive May Be Failing: What to Check First
A warning, a degraded pool or a drive that dropped out. Every page here starts with what to back up and what not to do, then the maker's own steps.
Questions
- Is My Hard Drive Failing?
A SMART FAIL or SMART error predicts that the drive will fail soon, even while it still works normally, and no one can say when. - My NAS Storage Pool Is Degraded: What Should I Do First?
A degraded pool is still accessible: Synology and QNAP both say so. - RAID 5 or RAID 6 With Large Hard Drives: Which Should I Use?
RAID 5 survives one drive failure and RAID 6 survives two, in the words of Synology, QNAP and Asustor. - My Synology Says a Drive Has Bad Sectors: Should I Replace It?
Synology gives no bad sector count at which to replace a drive. - What Does My Synology Drive Status Mean, and What Should I Do?
Synology's DSM 7.4 help recommends replacing a Critical drive immediately, and says Healthy means the drive is in good condition or its warning was suppressed or disabled.