When talking Hard Drive speeds is it Bits or Bytes?

[phaxmohdem]

Hey I was just wondering, when we are talking hard drive speeds (eg. ATA66 ATA100 & 133 SATA 150, etc) are those numbers megaBYTES/sec or megaBITS?

 

[Hacp]

bits I beleive

 

[Fullmetal Chocobo]

bits.

 

[Pariah]

no, those are all referring to bytes.

 

[phaxmohdem]

so ATA66 = 8.25 Megabytes sustained theoretical throughput?
ATA100 = 12.5MB/sec
ATA133 = 16.625MB/sec
sata150 = 18.75MB/sec?

seems awful slow (assumming MB = 1000000 bytes @ 8 bits/byte)

 

[bob4432]

MB=MegaBytes
Mb=Megabit

ata66 is in theory 66MB/s, so MegaBytes
sata150 is 150MB/s so MegaBytes, again in theory

and these are theoretical maxs for the given spec, the hdds are still slower and can now barely saturate a ata66 connection (for the most part with the exception of the newer hdds), but a 1 gen hdd 7200rpm 8mb cache hdd or even a 1gen 10krpm u320 8MB cache scsi hdd will have a str of ~55-60MB/s.

 

[bob4432]

Originally posted by: phaxmohdem
so ATA66 = 8.25 Megabytes sustained theoretical throughput?
ATA100 = 12.5MB/sec
ATA133 = 16.625MB/sec
sata150 = 18.75MB/sec?

seems awful slow (assumming MB = 1000000 bytes @ 8 bits/byte)

see what i said......

 

[phaxmohdem]

Thanks for clearing that up. I'll sleep easier now

 

[Pariah]

Network transfer rates are always given in bits. Hard drive transfer rates were always given in bytes. I say were, because with the advent of SATA you will now see 1.5 Gigabits/s and 3 Gigabits/s along with the traditional 150MB/s and 300MB/s.

 

[bob4432]

Originally posted by: Pariah
Network transfer rates are always given in bits. Hard drive transfer rates were always given in bytes. I say were, because with the advent of SATA you will now see 1.5 Gigabits/s and 3 Gigabits/s along with the traditional 150MB/s and 300MB/s.

just to confuse the noobs... plus now they can use the term "giga" and make it sound so much better, f*cking a##holes

 

[SnoMunke]

Originally posted by: bob4432

Originally posted by: Pariah
Network transfer rates are always given in bits. Hard drive transfer rates were always given in bytes. I say were, because with the advent of SATA you will now see 1.5 Gigabits/s and 3 Gigabits/s along with the traditional 150MB/s and 300MB/s.

just to confuse the noobs... plus now they can use the term "giga" and make it sound so much better, f*cking a##holes

No coffee yet?

 

[ribbon13]

Originally posted by: SnoMunke

Originally posted by: bob4432

Originally posted by: Pariah
Network transfer rates are always given in bits. Hard drive transfer rates were always given in bytes. I say were, because with the advent of SATA you will now see 1.5 Gigabits/s and 3 Gigabits/s along with the traditional 150MB/s and 300MB/s.

just to confuse the noobs... plus now they can use the term "giga" and make it sound so much better, f*cking a##holes

No coffee yet?

Genuine funny.