- Post
- #692481
- Topic
- Harmy's STAR WARS Despecialized Edition HD - V2.7 - MKV (Released)
- Link
- https://originaltrilogy.com/post/id/692481/action/topic#692481
- Time
The red drives report any read or write errors back to the controller very quickly instead of stalling and going into the recovery mode where the drive automatically tries to remap the sector by reading over and over. If you only have one disk, then this is the only chance to get your data from that sector back and, if successful, I don't believe the error is ever reported to the controller (but it should be visible in the SMART data).
In a multi-disk array this interruption will cause the array to degrade due to the lengthy timeout and the disk will be marked bad. This is undesirable for an array since it has redundancy built in above the physical disk layer.
When an array of red drives detects the error, the sector is marked as bad immediately, the sector is remapped and the data is recovered using the parity stored in the array itself (RAID 5 for example). This saves having to recover an entire degraded array due to one error (of which there can be many before the disk is truly bad).
Other than that, I'm not sure what the other differences between the drives are, but I believe this is the biggest one. So the extra cost is probably unnecessary.