SATA and ATA
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From: a.h. on 9 Apr 2005 03:30 What technical differences are between SATA and ATA?
From: IDIDIT on 9 Apr 2005 04:46 On 9 Apr 2005 00:30:00 -0700, "a.h." <ahsharif(a)gmail.com> wrote: >What technical differences are between SATA and ATA? Besides marketing hype not much performance difference. The power cable connection and the flat info cable is much more narrow than the 80 wire flat ribbon one. A word of caution, the connector guide or holder on the drive for the info cable was/is brittle on one of my drives and broke off with a bit of careless cable removal, not pulled out straight. NOT covered by warrenty! = useless drive!
From: J. Clarke on 9 Apr 2005 08:59 a.h. wrote: > What technical differences are between SATA and ATA? Mostly hype. SATA sends data one bit at a time down a single pair and receives it the same way, vs 8 bits in parallel for PATA. The SATA interface has a transfer rate of 150 or 300 MB/sec vs 133 for the fastest version of PATA, which is moot because there are no drives that can fill even a 100 MB/sec channel. SATA uses a thin cable with connectors only slighly more fragile than DDT-affected eggs, PATA uses a wide ribbon cable with relatively durable connectors. SATA is specified to support hot-swapping of drives (in practice that doesn't work too well yet) while PATA does not. One can buy 10,000 RPM drives with PATA interfaces but not with SATA. That pretty much covers it I think. If you want details of signal levels and encodings and command sets and whatnot you'll need to dig up a copy of the specs. -- --John to email, dial "usenet" and validate (was jclarke at eye bee em dot net)
From: Bob Willard on 9 Apr 2005 10:21 a.h. wrote: > What technical differences are between SATA and ATA? > SATA = Serial ATA; (P)ATA = Parallel ATA. The SATA cable is much narrower than the PATA cable and, therefore, less likely to block air flow in a case. The SATA cable (by spec) can be longer than the PATA cable and, therefore, allows more freedom in placing HDs w.r.t. the MB in a full tower case. SATA is less sensitive to crosstalk and, probably, RFI; but I won't argue about whether or not those issues are of practical importance. SATA supports one device per cable, while PATA supports two; I contend that this makes SATA better, but others may think the opposite. -- Cheers, Bob
From: Derek Baker on 9 Apr 2005 10:30
"J. Clarke" <jclarke.usenet(a)snet.net.invalid> wrote in message news:d38n9m118o1(a)news2.newsguy.com... > a.h. wrote: > >> What technical differences are between SATA and ATA? > > Mostly hype. > > SATA sends data one bit at a time down a single pair and receives it the > same way, vs 8 bits in parallel for PATA. The SATA interface has a > transfer rate of 150 or 300 MB/sec vs 133 for the fastest version of PATA, > which is moot because there are no drives that can fill even a 100 MB/sec > channel. True for a single drive, but PATA takes two per cable. A couple of Raptors @ 70MB/sec each would we restricted by ATA-133. >SATA uses a thin cable with connectors only slighly more fragile > than DDT-affected eggs, PATA uses a wide ribbon cable with relatively > durable connectors. SATA is specified to support hot-swapping of drives > (in practice that doesn't work too well yet) while PATA does not. One can > buy 10,000 RPM drives with PATA interfaces but not with SATA. > > That pretty much covers it I think. If you want details of signal levels > and encodings and command sets and whatnot you'll need to dig up a copy of > the specs. > -- Derek |