Historický pevný disk Western Digital s kapacitou 42MB. Stále plne funkčný. Kvalita 90-tych rokov (všimnite si ochrannú pásku po obvode disku). Jeden z prvých modelov používajúcich technológiu tzv. voice-coil pre vystatovanie hláv. Kus počítačovej histórie.

• Typ: WDAC140 Caviar 140
• Rozhranie” PATA / IDE
• Made in Singapore
• Geometria: C x H x S = 980 × 5 × 17
• Model: WDAC140–52S
• P/N: 99–004105–002
• CCC: A3 26-OCT-91
• DCM: BBABTA
• Vadné sektory: 0
• Otáčky: 3600
• Format: 3.5” ½ výška
• Napájanie: 5V/0.2A, 12V/0.4A
• Parametre na webe Western Digital: WDAC140
• Cenný model pre:
  • technické múzeá
  • školy so zameraním na výuku IT
  • záujmové krúžky technického smeru
  • zberateľov
  • forensic špecialistov
  • retro fajnšmekrov
  • retro opravy

hdparm -i

Model=WDC AC140, FwRev=2.62, SerialNo=WD2285850
Config={ HardSect NotMFM HdSw>15uSec SpinMotCtl Fixed DTR>5Mbs FmtGapReq }
RawCHS=980/5/17, TrkSize=9656, SectSize=568, ECCbytes=4
BuffType=DualPortCache, BuffSize=7kB, MaxMultSect=0
(maybe): CurCHS=0/0/0, CurSects=0, LBA=no
IORDY=no
PIO modes:  pio0
AdvancedPM=no

hdparm -I

ATA device, with non-removable media
        Model Number:       WDC AC140
        Serial Number:      WD2285850
        Firmware Revision:  2.62
Standards:
        Likely used: 1
Configuration:
        hard sectored
        not MFM encoded
        head switch time > 15us
        spindle motor control option
        fixed drive
        disk xfer rate > 5Mbs, <= 10Mbs
        format speed tolerance gap reqd
        Logical         max     current
        cylinders       980     0
        heads           5       0
        sectors/track   17      0
        --
        bytes/track: 9656       bytes/sector: 568
        Logical/Physical Sector size:           512 bytes
        device size with M = 1024*1024:          40 MBytes
        device size with M = 1000*1000:          42 MBytes
        cache/buffer size  = 7 KBytes (type=DualPortCache)
Capabilities:
        IORDY not likely
        Buffer type: 0003: dual port, multi-sector with read caching ability
        Buffer size: 7.0kB      bytes avail on r/w long: 4
        Cannot perform double-word IO
        R/W multiple sector transfer: not supported
        DMA: not supported
        PIO: pio0

fdisk -l

Disk /dev/sdb: 42 MB, 42649600 bytes
255 heads, 63 sectors/track, 5 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x699756b4

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1               1           5       40131    c  W95 FAT32 (LBA)