sata/esata cable length limits?
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From: Al Dykes on 23 Feb 2010 07:36 What are the length limits for sata and esata cables? Can someone point me to a source for PC adapter bracket that brings a sata connector (not esata) out to the back of a PC. Thanks. -- Al Dykes News is something someone wants to suppress, everything else is advertising. - Lord Northcliffe, publisher of the Daily Mail
From: Arno on 23 Feb 2010 08:57 Al Dykes <adykes(a)panix.com> wrote: > What are the length limits for sata and esata cables? SATA: 1m. eSATA: 2m. > Can someone point me to a source for PC adapter bracket that brings a > sata connector (not esata) out to the back of a PC. I got one with an ASUS mainboard. No idea whether it can be had as acessory. Not so clean alternative is to use an 1m cable and pull that out through some opening. I use such a set-up for testing purposes, along with power (fused at 4A) pulled out with a custom cable. Arno -- Arno Wagner, Dr. sc. techn., Dipl. Inform., CISSP -- Email: arno(a)wagner.name GnuPG: ID: 1E25338F FP: 0C30 5782 9D93 F785 E79C 0296 797F 6B50 1E25 338F ---- Cuddly UI's are the manifestation of wishful thinking. -- Dylan Evans
From: Yousuf Khan on 23 Feb 2010 18:01 Arno wrote: > Al Dykes <adykes(a)panix.com> wrote: > >> What are the length limits for sata and esata cables? > > SATA: 1m. eSATA: 2m. > >> Can someone point me to a source for PC adapter bracket that brings a >> sata connector (not esata) out to the back of a PC. > > I got one with an ASUS mainboard. No idea whether it can be had > as acessory. Not so clean alternative is to use an 1m cable > and pull that out through some opening. I use such a set-up for > testing purposes, along with power (fused at 4A) pulled > out with a custom cable. What are the limits for those eSATA cables that connect directly to a SATA port in the motherboard through a simple converter? Yousuf Khan
From: Andy on 23 Feb 2010 22:43 On 23 Feb 2010 07:36:21 -0500, adykes(a)panix.com (Al Dykes) wrote: > >What are the length limits for sata and esata cables? > >Can someone point me to a source for PC adapter bracket that brings a >sata connector (not esata) out to the back of a PC. > >Thanks. http://www.firewire-1394.com/sata-data-power-internal-external.htm
From: Arno on 24 Feb 2010 09:54
Yousuf Khan <bbbl67(a)spammenot.yahoo.com> wrote: > Arno wrote: >> Al Dykes <adykes(a)panix.com> wrote: >> >>> What are the length limits for sata and esata cables? >> >> SATA: 1m. eSATA: 2m. >> >>> Can someone point me to a source for PC adapter bracket that brings a >>> sata connector (not esata) out to the back of a PC. >> >> I got one with an ASUS mainboard. No idea whether it can be had >> as acessory. Not so clean alternative is to use an 1m cable >> and pull that out through some opening. I use such a set-up for >> testing purposes, along with power (fused at 4A) pulled >> out with a custom cable. > What are the limits for those eSATA cables that connect directly to a > SATA port in the motherboard through a simple converter? 1m total. True eSATA is electrically a bit (not a lot) different to suppoer the increased cable lenght. However everything going over (e)SATA is checksummed, so you should not get data corruption with an occasional error. With a lot of interface errors, you could also get silent corruption, since the checksums have a probablility of not catching multiple errors in one data package. I would need to look up what checksums are used in detail to estimate how likely that is. If it is CRC32, then the probability of an uncaught error is very roughly one in 2^32 for multiple (>= 32) random errors per data block. That is pretty low and an SATA connection with that many errors will be severely slowed down anyways, think > 100x slower. In additition the OS (or RAID controller) will decide that such a disk is unusable because of repeated errors pretty fast. Bottom line: It may fail or be slow but will in most cases not silently corrupt your data, so you can try it out. Just do not expet it to be really reliable, even if it works. Arno -- Arno Wagner, Dr. sc. techn., Dipl. Inform., CISSP -- Email: arno(a)wagner.name GnuPG: ID: 1E25338F FP: 0C30 5782 9D93 F785 E79C 0296 797F 6B50 1E25 338F ---- Cuddly UI's are the manifestation of wishful thinking. -- Dylan Evans |