I've bought a couple of Seatgate(badged Compaq) 80 pin scsi HD's(Ultra
2). I've olso order a couple of adapters. Two of each 80 pin - 68pin,
& 80 pin to 68 or 50 pin.
I'm completely new to SCSI and would like to know what contoller I can
and cannot connet to from the above HD's.
For example can I use a 68 pin ribbon cable or 50 pin ribbon cable or
will both work. Would a more modern controller still work with an
order SCSI drive?
I've seen a few Compaq/HP Smart array RAID controller such as the
3200. Would this one be suitable for the above SCSI drive?
At Fri, 09 Nov 2007 22:47:52 -0800 "chris.wilkins10@virgin.net" <chris.wilkins10@virgin.net> wrote:
>
> Hi all
>
> Im setting up a small server from 2nd hand parts.
>
> I've bought a couple of Seatgate(badged Compaq) 80 pin scsi HD's(Ultra
> 2). I've olso order a couple of adapters. Two of each 80 pin - 68pin,
> & 80 pin to 68 or 50 pin.
>
> I'm completely new to SCSI and would like to know what contoller I can
> and cannot connet to from the above HD's.
> For example can I use a 68 pin ribbon cable or 50 pin ribbon cable or
> will both work. Would a more modern controller still work with an
> order SCSI drive?
The 80 connector drives are meant for use with 'hot swap' drive
chassises. The 80 pin connector combines the 68 pin data connector, a
set of drive id pins and the power connections. This is called a SCA
disk.
>
> I've seen a few Compaq/HP Smart array RAID controller such as the
> 3200. Would this one be suitable for the above SCSI drive?
You can actually use any (modern) SCSI/RAID controller. You just need
either a SCA/'hot swap' drive chassis OR a 68-80 pin adapter (cost about
$15 each).
>
> Thanks
>
> Chris W.... S.London
>
>
--
Robert Heller -- Get the Deepwoods Software FireFox Toolbar!
Deepwoods Software -- Linux Installation and Administration http://www.deepsoft.com/ -- Web Hosting, with CGI and Database heller@deepsoft.com -- Contract Programming: C/C++, Tcl/Tk
On 10 Nov, 15:07, Robert Heller <hel...@deepsoft.com> wrote:
> At Fri, 09 Nov 2007 22:47:52 -0800 "chris.wilkin...@virgin.net" <chris.wilkin...@virgin.net> wrote:
>
>
>
> > Hi all
>
> > Im setting up a small server from 2nd hand parts.
>
> > I've bought a couple of Seatgate(badged Compaq) 80 pin scsi HD's(Ultra
> > 2). I've olso order a couple of adapters. Two of each 80 pin - 68pin,
> > & 80 pin to 68 or 50 pin.
>
> > I'm completely new to SCSI and would like to know what contoller I can
> > and cannot connet to from the above HD's.
> > For example can I use a 68 pin ribbon cable or 50 pin ribbon cable or
> > will both work. Would a more modern controller still work with an
> > order SCSI drive?
>
> The 80 connector drives are meant for use with 'hot swap' drive
> chassises. The 80 pin connector combines the 68 pin data connector, a
> set of drive id pins and the power connections. This is called a SCA
> disk.
>
>
>
> > I've seen a few Compaq/HP Smart array RAID controller such as the
> > 3200. Would this one be suitable for the above SCSI drive?
>
> You can actually use any (modern) SCSI/RAID controller. You just need
> either a SCA/'hot swap' drive chassis OR a 68-80 pin adapter (cost about
> $15 each).
>
>
>
> > Thanks
>
> > Chris W.... S.London
>
> --
> Robert Heller -- Get the Deepwoods Software FireFox Toolbar!
> Deepwoods Software -- Linux Installation and Administrationhttp://www.deepsoft.com/ -- Web Hosting, with CGI and Database
> hel...@deepsoft.com -- Contract Programming: C/C++, Tcl/Tk
Can a 50 pin cable (with adapter) be used with a 80 pin HD?
chris.wilkins10@virgin.net <chris.wilkins10@virgin.net> wrote:
> Hi all
>
> Im setting up a small server from 2nd hand parts.
>
> I've bought a couple of Seatgate(badged Compaq) 80 pin scsi HD's(Ultra
> 2). I've olso order a couple of adapters. Two of each 80 pin - 68pin,
> & 80 pin to 68 or 50 pin.
>
> I'm completely new to SCSI and would like to know what contoller I can
> and cannot connet to from the above HD's.
> For example can I use a 68 pin ribbon cable or 50 pin ribbon cable or
> will both work. Would a more modern controller still work with an
> order SCSI drive?
use anything but a Compaq/HP controller unless you have a Compaq/HP
machine itself.
You have some older disks there, and a good match might be an Adaptec
2100s RAID card. They're cheap and have excellent native OS support.
they're solid with windows, FreeBSD and linux.
Use 68pin cables, and make sure you have termination setup correctly. SCA
80 pin to HD68 adapters are fine.
> I've seen a few Compaq/HP Smart array RAID controller such as the
> 3200. Would this one be suitable for the above SCSI drive?
At Sun, 11 Nov 2007 14:59:52 -0800 "chris.wilkins10@virgin.net" <chris.wilkins10@virgin.net> wrote:
>
> On 10 Nov, 15:07, Robert Heller <hel...@deepsoft.com> wrote:
> > At Fri, 09 Nov 2007 22:47:52 -0800 "chris.wilkin...@virgin.net" <chris.wilkin...@virgin.net> wrote:
> >
> >
> >
> > > Hi all
> >
> > > Im setting up a small server from 2nd hand parts.
> >
> > > I've bought a couple of Seatgate(badged Compaq) 80 pin scsi HD's(Ultra
> > > 2). I've olso order a couple of adapters. Two of each 80 pin - 68pin,
> > > & 80 pin to 68 or 50 pin.
> >
> > > I'm completely new to SCSI and would like to know what contoller I can
> > > and cannot connet to from the above HD's.
> > > For example can I use a 68 pin ribbon cable or 50 pin ribbon cable or
> > > will both work. Would a more modern controller still work with an
> > > order SCSI drive?
> >
> > The 80 connector drives are meant for use with 'hot swap' drive
> > chassises. The 80 pin connector combines the 68 pin data connector, a
> > set of drive id pins and the power connections. This is called a SCA
> > disk.
> >
> >
> >
> > > I've seen a few Compaq/HP Smart array RAID controller such as the
> > > 3200. Would this one be suitable for the above SCSI drive?
> >
> > You can actually use any (modern) SCSI/RAID controller. You just need
> > either a SCA/'hot swap' drive chassis OR a 68-80 pin adapter (cost about
> > $15 each).
> >
> >
> >
> > > Thanks
> >
> > > Chris W.... S.London
> >
> > --
> > Robert Heller -- Get the Deepwoods Software FireFox Toolbar!
> > Deepwoods Software -- Linux Installation and Administrationhttp://www.deepsoft.com/ -- Web Hosting, with CGI and Database
> > hel...@deepsoft.com -- Contract Programming: C/C++, Tcl/Tk
>
> Can a 50 pin cable (with adapter) be used with a 80 pin HD?
*Maybe*, but why? Wide (68pin) SCSI cards are 'cheap enough' (check on
EBay -- AHA2940UW type controllers abound, cheap) -- almost all
*modern* SCSI controllers support 16-bit wide disks (68pin). Unless
you want to use an old ISA card or something. With a 50-pin connector,
you are stuck with SE performance, and 1/2 the data rate of even a wide
connection at SE speeds. With a 68-80 pin adapter and a (68-pin) LVD
cable/controller you will get 2-4 times the data rate (depends on
whether the disk is U160 or U320 and which the controller supports).
>
> Chris W.
>
>
--
Robert Heller -- Get the Deepwoods Software FireFox Toolbar!
Deepwoods Software -- Linux Installation and Administration http://www.deepsoft.com/ -- Web Hosting, with CGI and Database heller@deepsoft.com -- Contract Programming: C/C++, Tcl/Tk
> chris.wilkins10@virgin.net <chris.wilkins10@virgin.net> wrote:
>
>>Hi all
>>
>>Im setting up a small server from 2nd hand parts.
>>
<snip>
> use anything but a Compaq/HP controller unless you have a Compaq/HP
> machine itself.
>
I have been using the Compaq Smart-2P RAID HBA in non-Compaq boxen
for many years with excellent results and highly recommend it
for good SCSI-2 configurations.
Robert Heller wrote:
> At Sun, 11 Nov 2007 14:59:52 -0800 "chris.wilkins10@virgin.net" <chris.wilkins10@virgin.net> wrote:
> >
> > [...]
> > Can a 50 pin cable (with adapter) be used with a 80 pin HD?
>
> *Maybe*, but why? Wide (68pin) SCSI cards are 'cheap enough' (check on
> EBay -- AHA2940UW type controllers abound, cheap) -- almost all
> *modern* SCSI controllers support 16-bit wide disks (68pin).
The OP wrote the disks are "Ultra 2", this means they are most likely
Fast40/LVD. If the disks support LVD physical layer the OP should try to
benefit from it and therefore he should IMHO look at least for an
AHA-2940U2W (with emphasis on the "2" in "U2W").
> Unless
> you want to use an old ISA card or something. With a 50-pin connector,
> you are stuck with SE performance,
Not in general. You can get up to Fast40/LVD (and Fast40/HVD) from a
50Pin cable. It can be used by the OP if he knows what he is doing. The
first problem with 50Pin cables is that the SCA-Adapter should have
terminators (or pull-ups) for the unused bus lines if the disk have a
wide interface [1]. The second one is that if both (disks and HA) have a
wide interface the bus-width negotiation will fail and must be manually
disabled on both ends [2].
I agree with the conclusion:
For the OP it is the easiest way to use simple cheap 80Pin to 68Pin
Adapters, a 68Pin cable and a HA with wide Interface (68Pin connector).
Micha
[1] Yes, there are also disks with narrow interface and 80Pin SCA
connector out there
[2] If no domain validation is used (what was common for Fast40)
Robert Heller wrote in news:7ac11$473794ac$404a99a1$26446@news.news-service.com
> At Sun, 11 Nov 2007 14:59:52 -0800 chris.wilkins10@virgin.net <chris.wilkins10@virgin.net> wrote:
> > On 10 Nov, 15:07, Robert Heller <hel...@deepsoft.com> wrote:
> > > At Fri, 09 Nov 2007 22:47:52 -0800 chris.wilkin...@virgin.net <chris.wilkin...@virgin.net> wrote:
> > >
> > > > Hi all
> > >
> > > > Im setting up a small server from 2nd hand parts.
> > >
> > > > I've bought a couple of Seatgate(badged Compaq) 80 pin scsi HD's(Ultra
> > > > 2). I've olso order a couple of adapters. Two of each 80 pin - 68pin,
> > > > & 80 pin to 68 or 50 pin.
> > >
> > > > I'm completely new to SCSI and would like to know what contoller I can
> > > > and cannot connet to from the above HD's.
> > > > For example can I use a 68 pin ribbon cable or 50 pin ribbon cable or
> > > > will both work. Would a more modern controller still work with an
> > > > order SCSI drive?
> > >
> > > The 80 connector drives are meant for use with 'hot swap' drive
> > > chassises. The 80 pin connector combines the 68 pin data connector, a
> > > set of drive id pins and the power connections. This is called a SCA disk.
> > >
> > >
> > >
> > > > I've seen a few Compaq/HP Smart array RAID controller such as the
> > > > 3200. Would this one be suitable for the above SCSI drive?
> > >
> > > You can actually use any (modern) SCSI/RAID controller. You just need
> > > either a SCA/'hot swap' drive chassis OR a 68-80 pin adapter (cost about
> > > $15 each).
> > >
> > >
> > >
> > > > Thanks
> > >
> > > > Chris W.... S.London
> > >
> >
> > Can a 50 pin cable (with adapter) be used with a 80 pin HD?
>
> *Maybe*, but why? Wide (68pin) SCSI cards are 'cheap enough' (check on
> EBay -- AHA2940UW type controllers abound, cheap) -- almost all
> *modern* SCSI controllers support 16-bit wide disks (68pin). Unless
> you want to use an old ISA card or something.
> With a 50-pin connector, you are stuck with SE performance,
Nope.
> and 1/2 the data rate of even a wide connection at SE speeds.
That actually depends on it's true throughput.
Since they are U2 they probably are limited to 20MB/s or so anyway.
At narrow SE they will run at ~15MB/s.
> With a 68-80 pin adapter and a (68-pin) LVD
> cable/controller you will get 2-4 times the data rate
Yeah, right.
> (depends on whether the disk is U160 or U320 and which the controller supports).
As usual Heller couldn't be bothered to read the post.
Michael Baeuerle wrote in news:2opl05-u3b.ln1@micha.freeshell.org
> Robert Heller wrote:
> > At Sun, 11 Nov 2007 14:59:52 -0800 chris.wilkins10@virgin.net <chris.wilkins10@virgin.net> wrote:
> > >
> > > [...]
> > > Can a 50 pin cable (with adapter) be used with a 80 pin HD?
> >
> > *Maybe*, but why? Wide (68pin) SCSI cards are 'cheap enough' (check on
> > EBay -- AHA2940UW type controllers abound, cheap) -- almost all
> > *modern* SCSI controllers support 16-bit wide disks (68pin).
>
> The OP wrote the disks are "Ultra 2", this means they are most likely
> Fast40/LVD. If the disks support LVD physical layer the OP should try to
> benefit from it and therefore he should IMHO look at least for an
> AHA-2940U2W (with emphasis on the "2" in "U2W").
The OP also wrote "80 pin seatgate to what *RAID* controller"
>
> > Unless you want to use an old ISA card or something. With a 50-pin connector,
> > you are stuck with SE performance,
>
> Not in general.
> You can get up to Fast40/LVD (and Fast40/HVD) from a 50Pin cable.
Whatever that is supposed to mean.
> It can be used by the OP if he knows what he is doing.
> The first problem with 50Pin cables is that the SCA-Adapter should have
> terminators (or pull-ups) for the unused bus lines
> if the disk have a wide interface [1].
The Seagates I have do not have that 'problem'.
They startup fine without a biased bus.
> The second one is that if both (disks and HA) have a wide interface the
> bus-width negotiation will fail
Well, actually it doesn't and that is what the problem is.
> and must be manually disabled on both ends [2].
Nope. HBA end only will do fine.
>
> I agree with the conclusion:
More fool you.
> For the OP it is the easiest way to use simple cheap 80Pin to 68Pin Adapters,
With SE controllers.
With LVD controllers it's less simple and you need to watch out that you
get the proper (LVD compliant) ones.
> a 68Pin cable and a HA with wide Interface (68Pin connector).
>
>
> Micha
> [1] Yes, there are also disks with narrow interface and 80Pin SCA
> connector out there
And there are also drives that don't need High-Byte biasing to work.
> [2] If no domain validation is used (what was common for Fast40)
80 pin seatgate to what RAID controller 
Linear Mode
