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Obračun ATAPI CD-ROM jedinica
19.09.2000.
    « Prev  : Stranica 1 od 3 :  Next »      By ::  Ozren Žagmešter 
- Uvod -

Kada kupujemo kompjutorske komponente uvijek želimo kupiti što bolje za što manje novaca. Neki put, nažalost, teško dolazimo do potrebnih informacija da bi naš izbor bio onaj pravi. Takav je slučaj i s CD-ROM jedinicama. Obično se izbor bazira na tome kolika je cijena (što manja to bolje) te o deklariranoj brzini. No, deklarirana brzina jednog CD-ROM-a nije pravi pokazatelj. Često proizvođači pretjeruju kada govore o performansama svojih proizvoda, a još češće znaju ne spomenuti neke mane istih.

Ovo je prvi članak u seriji od tri koji se bave CD-ROM i DVD jedinicama. Od MSan Grupe smo dobili između ostalog i tri ATAPI CD-ROM-a na testiranje, i to:

  • TEAC CD540E
  • ASUS CD-S400
  • ASUS CD-S500.

Grupna fotografija naših natjecatelja

TEAC CD540E

TEAC-ov 40 brzinski CD-ROM je stigao samo u najlonskoj vrećici koja osim same jedinice sadržava i potrebne kablove (tzv. OEM pakiranje). S obzirom da je na samom CD-ROM-u obilježeno kako treba postaviti jumper-e da bi konfigurirali da li je CD-ROM master ili slave jedinica, uputstva i nisu bila potrebna. Za neke su stvari uputstva izuzetno bitna, dapače nužna (SCSI kontroleri), no za jedan ATAPI (IDE) CD-ROM nisu. Instalacija je bila sekunda posla - spajanje IDE i naponskih kabela - i to je to. Dizajn samog CD-ROM-a je prosječan. Nije nam se svidjelo što TEAC nema prekidač za prebacivanje na sljedeću pjesmu, jer neki ljudi vole slušati muzičke CD-e dok rade, te mijenjati pjesme direktno na CD-ROM-u jer im se neda mijenjati prozor.

Tvorničke specifikacije:

  • Interface: IDE/ATAPI
  • Buffer: 128K
  • Vrijeme pristupa: tipično 85ms
  • Brzina: 40x
  • MTBF: 100.000 sati

ASUS CD-S400

ASUS CD-S400 je stigao u povećoj kutiji koja je osim same jedinice sadržavala kablove, kratka uputstva te driver-e za DOS. Drugo nismo ni očekivali. Kutija je u svakom slučaju bolji način pakiranja nego vrećica jer smanjuje šanse da će uređaj pretrpjeti oštećenja prilikom transporta. Instalacija je bila časak posla (naravno) jer treba spojiti samo dva kabla, a sam CD-ROM dolazi konfiguriran kako treba (master). Kao i ostala dva testirana CD-ROM-a, ASUS CD-S400 smo spojili kao sekundarnu IDE master jedinicu.

Tvorničke specifikacije:

  • Interface: IDE/ATAPI
  • Buffer: 128K
  • Vrijeme pristupa: tipično 75ms
  • Brzina: 40x
  • MTBF: 120.000 sati

ASUS CD-S500

Sve rečeno za ASUS CD-S400 vrijedi i za ASUS CD-S500. Nema se što dodati.

Tvorničke specifikacije:

  • Interface: IDE/ATAPI
  • Buffer: 128K
  • Vrijeme pristupa: tipično 80ms
  • Brzina: 50x
  • MTBF: 120.000 sati


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