Welcome, Seagate hard drive owners. A number of Seagate hard drives from the following families may become inaccessible when the host system is powered on:

Barracuda 7200.11
DiamondMax 22
Barracuda ES.2 SATA

Once a drive has become affected the data becomes inaccessible to users but the data is not deleted. Seagate has isolated this issue to a firmware bug affecting drives from these families manufactured in December 2008.


The following are potentially affected models. If you have one of these drives please choose it from the list for model-specific instructions.

Barracuda 7200.11
ST31000340AS
ST3750330AS
ST3640330AS
ST3500320AS
ST31500341AS
ST31000333AS
ST3640323AS
ST3640623AS
ST3320613AS
ST3320813AS
ST3160813AS


Barracuda ES.2 SATA
ST31000340NS
ST3750330NS
ST3500320NS
ST3250310NS


DiamondMax 22
STM31000340AS
STM3750330AS
STM3500320AS
STM31000334AS
STM3320614AS
STM3160813AS
STM31000333AS

Original link is available here at seagate.custkb.com