Performing a firmware update for your HDD, SSD, NAS, USB Flash drive or USB Hard drive is much more of risk.
For example, you may lose data from the disk, the firmware update may ruin the drive, and more other firmware problems.
However, Googling 7200.11 SD1A had results from Jan 2009-Feb 2009 stating that this was the very version number that CAUSED the drives to brick.
It's 3 years later and the drive still works despite the fact it's under the "affected firmware" and I'm hesitant to have him update to SD1A because I've seen no confirmation that SD1A works.
Therefore, only when there are bugs or issues should you update the firmware for your HDD, SSD, NAS, USB Flash drive, or other disks.
Edit: I'm bumping this question because I can't seem to find any definitive answers on the net about this.Note: HDD is short for hard disk drive, SSD for solid-state drive, and NAS for network-attached storage.Before updating or downloading firmware and drivers for your disks, backup all data first.Just a note to everyone that bashes a post that uses the term SATA I and SATA II, saying there is no such thing and it's an erroneous term -- Western Digital uses it all over their site. Unlike hardware driver update regularly on Windows, most hard drives do not need any firmware update.