Finding CHS values for 2.5" hard drives?

I want to put notebook drives in a Cobalt Qube 3 so it can run fanless. I bought a Seagate Momentus 120GB drive (ST9120822A) but the Linux boot process said the drive wasn't recognized. I confirmed the drive was good by testing it on another computer. Tried another 2.5" drive (pulled from a Western Digital Passport chassis) and confrimed the 2.5-3.5 adapter works - Linux correctly sized the drive (60GB).

Found this PDF at Seagate's site ( that shows all the Momentus 5400.3 drives have logical CHS of 92049/16/63. I think this is outside the tolerance of the Cobalt's IDE controller and/or Linux loader kernal version. I need a drive with cylinders in the 30,000 range.

The datasheets I pulled for Western Digital Scorpio ( and Fujitsu drives ( don't mention CHS values. The drives don't have to be 120GB, but those are the largest the controller appears to support (24-bit LBA).

Can anyone suggest where/how I can determine a drive's CHS before purchasing, especially since the manufacturer doesn't provide?

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  1. google??????????'s got to be out there somewhere....:)
  2. Google wasn't helping me out last night when I looked. Tried again just now with WD1200BEVE chs and found this page: which shows

    ATA device, with non-removable media
    Model Number: WDC WD1200BEVE-00WZT0
    Serial Number: WD-WXEY07V39813
    Firmware Revision: 01.01A01
    Supported: 8 7 6 5
    Likely used: 8
    Logical max current
    cylinders 16383 16383
    heads 16 16
    sectors/track 63 63
    CHS current addressable sectors: 16514064
    LBA user addressable sectors: 234441648
    LBA48 user addressable sectors: 234441648
    device size with M = 1024*1024: 114473 MBytes
    device size with M = 1000*1000: 120034 MBytes (120 GB)

    So I'll RMA the Seagate for the WD Scorpio and see how it goes.
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