WTB: SCSI SCSI 50p and 68p adapter with Bracket, tube-cable and &C - Page 1
Forum section: electronics / general

author: legacy
author_rank: Super Contributor
timestamp: August 18, 2018, 10:22:33 am
content: so, I have to cablethe internal chainof an SCSI tower with two chains of four units each. On each chain at least two devices require a good airflow and cabling them with flat cables doesn't help. Besides, cabling with flat cables looks a mess and I'd like to make a neat job. I'd like to use tube-shaped cables instead of flat cables since they make the cabling neater and the air flow is better inside the SCSI tower, but these cables are designed only for internal cabling, hence the problem is: how to (find a kit to)wire them to the panel?Code:panel --- bracket ------------||\__ unit0/|\__ unit1/|\__ unit2/|\__ unit3/||panel --- bracket ------------I need two cable-sets, one for 50pin narrow units, and one for 68pin wide units:50pin, on the panel I'd like to have a Centronics connector, hence the panel-bracket should be Centronics to SCSI@50pin/female, and the tube-shaped cable has six SCSI@50pin/female connectors on it68pin, on the panel I'd like to have SCSI@68pin/female, hence the panel-bracket should be SCSI@68pin/female to SCSI@68pin/female, and the tube-shaped cable has six SCSI@68pin/male connectors on ithints, tips, ... are welcomeedit:this is an example of panel-bracket. It's sold as "Slot Bracket", but the metal slot can be removed, and it perfectly fits my tower's panel.

author: PlainName
author_rank: Super Contributor
timestamp: August 18, 2018, 12:46:20 pm
content: Does the airflow have to be front to back (or back to front)? Can it not go side to side?

author: legacy
author_rank: Super Contributor
timestamp: August 18, 2018, 03:07:04 pm
content: Quote from: dunkemhigh on August 18, 2018, 12:46:20 pmthe SCSI-tower is a metal big-case, and it's closed side by side, the air flow needs to go front to back

author: Nusa
author_rank: Super Contributor
timestamp: August 18, 2018, 04:42:33 pm
content: Are these existing panels? In which case a picture would probably go a long way.Or something you're constructing? Typically (but not always) external SCSI cables are done daisy-chain style, two connectors per drive, so all you need is a bunch of two-headed cables to connect them.What you're describing would probably have to be made up as a custom job.

author: legacy
author_rank: Super Contributor
timestamp: August 18, 2018, 08:33:18 pm
content: Quote from: Nusa on August 18, 2018, 04:42:33 pmyes, panels are in the back of the SCSI tower, that was a typical product sold in the 90s. It's OK as a product, got found one as an old stock item, brand new, and with all the parts, but internally the kit only provides a flat cable, wired to the panel, with eight connectors on the cable, and this is bad since it makes the cabling a mess to devices, and, worse still, it doesn't allow devices to have a good airflow.Some devices (like DVD-RAM burners) are very hot when they operate, in fact they have a little fan on their back, some (like CDrom readers) are only warm.

author: legacy
author_rank: Super Contributor
timestamp: August 18, 2018, 08:40:29 pm
content: Quote from: Nusa on August 18, 2018, 04:42:33 pmthe SCSI tower is terminated, hence it goes directly to the host (SCSI master, on the server) with one cable.The problem I have is on finding adapters/parts/etc to complete the cabling*inside*the SCSI tower.e.g. I could recycle panels by cutting at the first connector the cable I currently have, and then use a female-68pin-to-female-68pin adapter to attach a patch-cable, but ... I can't find itCode:panel ------------------------- this line goes to the server by an external cable attached to the panel||\__ unit0/|\__ unit1/|\__ unit2/|\__ unit3/||panel ------------------------- this line is terminated by an external terminator attached to the panelusing the cable provided with the kit, I have already tested the device-chainCode:[8:0:1:0] disk MicTec DPAI-SCSI c2.7 /dev/sda[8:0:2:0] disk MicTec DPAI-SCSI c2.7 /dev/sdb[8:0:4:0] cd/dvd MATSHITA DVD-RAM LF-D200 A120 /dev/sr0[8:0:5:0] cd/dvd YAMAHA CRW8824S 1.00 /dev/sr1("8" is the ID of the SCSI-controller, the third number is the SCSI's ID of the device in the chain)they are all narrow/SE @ 50 pin SCSI devices;from the software point of view, everything goes well!electrically the topology is perfect;everything is ok, except:- the provided cable is a 50pin flat, the writing doesn't look neat, rather a mess- the last two units in the chain don't have the proper airflow- because the large flat-cable is difficult to be wired in a neat way- and it does not allow air to pass in front of their fan-coolersthe problem is even worse with the second SCSI chain I have to wire: the 68pin flat cable is even larger and more prone to become a mess

author: Nusa
author_rank: Super Contributor
timestamp: August 19, 2018, 12:33:13 am
content: So you're looking for something like these?http://www.cablesdirect.com/store/p/3798.aspxhttp://www.cablesdirect.com/store/p/3820.aspx

author: legacy
author_rank: Super Contributor
timestamp: August 19, 2018, 10:50:57 am
content: Quote from: Nusa on August 19, 2018, 12:33:13 amprecisely