I would expect that hdparm is right, and fdisk is doing LBA conversion....
here's my hdparm info
/dev/hda:
Model=PhatNoise DMS 10GB, FwRev=U1.14 F, SerialNo=52D92359T
Config={ Fixed }
RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=46
BuffType=unknown, BuffSize=0kB, MaxMultSect=16, MultSect=16
CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=19640880
IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120}
PIO modes: pio0 pio1 pio2 pio3 pio4
DMA modes: sdma0 sdma1 sdma2 mdma0 mdma1 mdma2
UDMA modes: udma0 udma1 udma2 udma3 *udma4
AdvancedPM=yes: unknown setting WriteCache=disabled
Drive conforms to: device does not report version:
* signifies the current active mode
ATA device, with non-removable media
Model Number: PhatNoise DMS 10GB
Serial Number: 52D92359T
Firmware Revision: U1.14 F
Standards:
Supported: 5 4 3 2
Likely used: 6
Configuration:
Logicalmaxcurrent
cylinders1638316383
heads1616
sectors/track6363
--
CHS current addressable sectors: 16514064
LBA user addressable sectors: 19640880
device size with M = 1024*1024: 9590 MBytes
device size with M = 1000*1000: 10056 MBytes (10 GB)
Capabilities:
LBA, IORDY(can be disabled)
bytes avail on r/w long: 46Queue depth: 1
Standby timer values: spec'd by Vendor, with device specific minimum
R/W multiple sector transfer: Max = 16Current = 16
Advanced power management level: unknown setting (0x0080)
DMA: sdma0 sdma1 sdma2 mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 *udma4
Cycle time: min=120ns recommended=120ns
PIO: pio0 pio1 pio2 pio3 pio4
Cycle time: no flow control=120ns IORDY flow control=120ns
Commands/features:
EnabledSupported:
*NOP cmd
*READ BUFFER cmd
*WRITE BUFFER cmd
*Host Protected Area feature set
*Look-ahead
Write cache
*Power Management feature set
Security Mode feature set
*SMART feature set
SET MAX security extension
*Advanced Power Management feature set
Security:
Master password revision code = 65534
supported
notenabled
notlocked
frozen
notexpired: security count
notsupported: enhanced erase
16min for SECURITY ERASE UNIT.
HW reset results:
CBLID- above Vih
Device num = 0 determined by the jumper
Checksum: correct
and fdisk:
Disk /dev/hda: 10.0 GB, 10056130560 bytes
64 heads, 32 sectors/track, 9590 cylinders
Units = cylinders of 2048 * 512 = 1048576 bytes
Device Boot Start End Blocks Id System
/dev/hda1 2 261 266240 b W95 FAT32
/dev/hda2 262 9590 9552896 5 Extended
/dev/hda5 262 9590 9552895+ b W95 FAT32
