SCSI/SERIAL ATA?

[Anduril]

Τι διαφορα εχουν οι σκληροι δισκοι που ειναι τεχνολογιας SCSI απου τους SERIAL ATA???

[mandos]

scsi rulez

 

kai tora se ayta pou xero:

 

to scsi antexei 16 h 32 syskeyes se enan controller

exei ftasei ta 320mb/s (U320) ta opoia den einai tosa se copy apo hdd se hdd alla leme tora

yparxei epishs sta 80mb/s kai 160mb/s kai sta 20mb/s gia ta cd-drives

 

oi scsi hdds vgainoun ektos apo 7200 kai 10000 rpm kai sta 15000rpm (!!!)

einai plhros CPU indipendant (h opos grafete)

den exei master kai slave (cool ee??) an kai kapoia id's exoun megisto priority kai ayta einai ta exis:

to 7 pou einai panta o scsi controller

to 0 pou synithos einai o boot disk

kai analoga me ton controller ta 6 kai 8 (oxi panta)

sthn sinexia pas me ayxousa seira

 

ypostirizei kai exoterikes syskeyes

ypostirizei epaggelmatika scanners

 

mporeis na exeis pollous scsi controllers fysika (an kai ginete kai sto sata nomizo)

 

kai pame sta poio eppagelmatika...

sto scsi yparxei (kai gia to scsi ftiaxtike) to gnosto raid (me eidikous controllers) to opoio omos den menei sta 0,1 ante me to zori 0+1

antitheta paei sto 5+1 pou einai h megalhterh asfaleia se hdd aythn thn stigmh

me 5hdds mporoun na sou kaoun (xtypa xilo) oi 2 xoris na xaseis data

einai hot-swappable pou simainei oti tous bgazeis apo to pc eno douleyoun kai vazeis allous

 

tora den thimame alla... ektos tou oti to kalodio tou scsi paei mexri 12metra an thimame kala <img src="http://www.insomnia.gr/ubbthreads/images/graemlins/smile.gif" alt="" />

 

gia tous sata den xero kai polla <img src="http://www.insomnia.gr/ubbthreads/images/graemlins/smile.gif" alt="" />

[dop]

Osa leei mandos syn ta e3hs :

 

1) Ta SCSI einai CPU independent logw toy oti dikia toys CPU (RISC texnologias) poy analambanei olo ton elegxo twn syskeywn

 

2) Doyleyoyn me paromoio systhma me to aplo ATA, dld parallhla. To SATA einai seiriako, dhl. point-to-point syndesh (apo syskeyh se mobo), enw to SCSI phgainei apo syskeyh se syskeyh kai en telei ston controller. Etsi, h teleytaia SCSI syskeyh 8elei kai termination.

 

An 8elame sygkrish tote to Firewire einai gia to SATA, oti to SCSI gia to IDE.

 

3) Oi SCSI diskoi exoyn meglytero MTBF (Mean time before failure) poy shmainei oti genika einai pio a3iopistoi apo toys IDE/SATA.. Synepws poly pio akriboi...

 

Ayta

[steliosdj]

Αναμενουμε το serial SCSI .... να δουμε ομως ποτε ...

Παντως εχει απιστευτες προδιαγραφες ! ...

 

[HamerZ]

Kai ama doyme kai kati apisteytes times.... <img src="http://www.insomnia.gr/ubbthreads/images/graemlins/wink.gif" alt="" />