I'm not sure whether its 7200rpm or not but my C: space is 113GB and D: 106.
The technician said others hv been used for win, drivers etc.
from properties the model is WDC WD2500BEVS-75UST0
Your WDC HDD is known as WD 2.5" 5400RPM Scorpio Blue 250 GB SATA HDD ( WD2500BEVS ). WD2500BEVS-75UST0 type is commonly used in Dell laptop models.
Your missing space in your 250GB HDD, apart from your files, has been used by Media Direct software, which is "possibly" stored in the Host Protected Area (HPA) hidden partition.
ubuntu@ubuntu:~$ sudo hdparm -I /dev/sda
/dev/sda:
ATA device, with non-removable media
Model Number: WDC WD2500BEVS-22UST0
Serial Number: WD-WXCX07373699
Firmware Revision: 01.01A01
Standards:
Supported: 8 7 6 5
Likely used: 8
Configuration:
Logical max current
cylinders 16383 16383
heads 16 16
sectors/track 63 63
--
CHS current addressable sectors: 16514064
LBA user addressable sectors: 114270345
LBA48 user addressable sectors: 114270345
device size with M = 1024*1024: 55796 MBytes
device size with M = 1000*1000: 58506 MBytes (58 GB)
Capabilities:
LBA, IORDY(can be disabled)
Queue depth: 32
Standby timer values: spec'd by Standard, with device specific minimum
R/W multiple sector transfer: Max = 16 Current = 8
Advanced power management level: unknown setting (0x0080)
Recommended acoustic management value: 128, current value: 254
DMA: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 udma5 *udma6
Cycle time: min=120ns recommended=120ns
PIO: pio0 pio1 pio2 pio3 pio4
Cycle time: no flow control=120ns IORDY flow control=120ns
Commands/features:
Enabled Supported:
* SMART feature set
Security Mode feature set
* Power Management feature set
* Write cache
* Look-ahead
* Host Protected Area feature set
* WRITE_BUFFER command
* READ_BUFFER command
* NOP cmd
* DOWNLOAD_MICROCODE
* Advanced Power Management feature set
SET_MAX security extension
Automatic Acoustic Management feature set
* 48-bit Address feature set
* Device Configuration Overlay feature set
* Mandatory FLUSH_CACHE
* FLUSH_CACHE_EXT
* SMART error logging
* SMART self-test
* General Purpose Logging feature set
* WRITE_{DMA|MULTIPLE}_FUA_EXT
* 64-bit World wide name
* IDLE_IMMEDIATE with UNLOAD
* Segmented DOWNLOAD_MICROCODE
* SATA-I signaling speed (1.5Gb/s)
* Native Command Queueing (NCQ)
* Host-initiated interface power management
* Phy event counters
DMA Setup Auto-Activate optimization
Device-initiated interface power management
* Software settings preservation
* SMART Command Transport (SCT) feature set
* SCT Long Sector Access (AC1)
* SCT LBA Segment Access (AC2)
* SCT Error Recovery Control (AC3)
* SCT Features Control (AC4)
* SCT Data Tables (AC5)
unknown 206[12]
unknown 206[13]
Security:
Master password revision code = 65534
supported
not enabled
not locked
frozen
not expired: security count
not supported: enhanced erase
88min for SECURITY ERASE UNIT.
Checksum: correct
http://ja.pastebin.ca/907143