[annisman]

I have 10 hdds total, using HDDSCAN under the 'SMART' diagnostics test - 4 of them are showing what appears to be errors. Can someone with knowledge of this tool please explain what they mean and if drive failure is imminent.

The first pic is my C drive, an old 120gig Mushkin SSD, the last 3 pics are all Seagate 3TB drives.

https://ibb.co/jW3TdDb

https://ibb.co/9ZBpTXb

https://ibb.co/cxmzwgN

https://ibb.co/26Z5rtD

 

[Worf]

Nothing fatal. SATA can downshift speeds if it detects transfer errors, and sometimes those get errors. A high rate might indicate bad cabling that may cause data corruption, but at one, it could be just a fluke.

Soft ECC errors happen, and are a normal part of flash memory.

For a hard disk, the number you want to pay attention to is the reallocation count - this tells you how many sectors are bad - you should have close to zero. But if the number starts climbing then you need to consider replacement. When it climbs really fast the drive is dying and must be replaced ASAP before the drive runs out.

For an SSD, the media lifetime indicator tells you how close you are to the rated life span. However, most SSDs can last a long time beyond the end of life. But how long is up in the air, so you should consider replacement if downtime is not an option.

 

[annisman]

Nothing fatal. SATA can downshift speeds if it detects transfer errors, and sometimes those get errors. A high rate might indicate bad cabling that may cause data corruption, but at one, it could be just a fluke.

Soft ECC errors happen, and are a normal part of flash memory.

For a hard disk, the number you want to pay attention to is the reallocation count - this tells you how many sectors are bad - you should have close to zero. But if the number starts climbing then you need to consider replacement. When it climbs really fast the drive is dying and must be replaced ASAP before the drive runs out.

For an SSD, the media lifetime indicator tells you how close you are to the rated life span. However, most SSDs can last a long time beyond the end of life. But how long is up in the air, so you should consider replacement if downtime is not an option.

Awesome, so you don't see any problems with these drives ? I know Seagate has a bad rep for their 3TB models but I haven't had one fail yet.

 

[Worf]

Like I said, watch the reallocated sector count. The raw value should be a handful at most. Once it starts growing to a hundred or so, you'd want to order replacement drives. When it grows quickly to thousand or so, replace the drive. It's still ok but I wouldn't trust it. If multiple drives start climbing from 100 upwards, then replace immediately to avoid array failure. You don't want multiple drive failure when you're rebuilding.