[Thinkpad] Hitachi drive difference?

[RWM]

The E-spec drives are designed for an extended duty cycle -- 
essentially, always on.

- RWM



eletourneau at verizon.net wrote:

> Hi. 
> 
> I need to replace the drive I run in a Thinkpad 600X . I like Hitachi, but
> I'm trying to figure out the difference between these two -- and can't.  
> Can anyone teach me?
> 
> 
> HITACHI Travelstar E7K100 HTE721080G9AT00 (0A26613) 80GB 7200 RPM 8MB
> Cache ATA-6 Notebook Hard Drive - OEM
> 
> HITACHI Travelstar 7K100 HTS721080G9AT00 (0A25023) 80GB 7200 RPM 8MB Cache
> ATA-6 Notebook Hard Drive - OEM
> 
> At newegg, one is $93, and one is $85.  There doesn't seem to a good
> explanation of the difference.  Does anyone know?
> 
> TIA.