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scsi questions...

post #1 of 5
Thread Starter 
first off sorry for starting another thread on this,i did a few search's but couldn't find what i needed to know...

anyway,when i built my pc about a month back, i looked into raptors and scsi drives but came to the conclusion it was abit to expensive for my needs .But lately on the bay there have been an abundance of scsi drives (well small gig ones),now i understand you need a controller card to use them,and that is the most expensive part (from looking at them new anyway)...i'll get more to the point i found a coulpe of seagate scsi drives (80pin) and basicly need to know these things:
1:how hard are the controller card to find?
2:is it just plug'n'play or can't it be an sob to install/get working?
3:will there be any benefits from scsi over sata2?
and last but not least
4:can raid be done on these drives and if so does it need a controller card or is it part of the above card ^^ ?

quite a few question i know ,any links to any info would be great help,thanks
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post #2 of 5
1)No: Newegg.com

2) Plug-in-play only works with an operating system so as long as you’re not using the SCSI drives as the ROOT you should be able to config easy.

3) There have been reports that STAT2 reaches burst speed of 342MB/s, but I would like to see the HD Tach report for confirmation. http://www.newegg.com/Product/Produc...82E16822145082

4) Some controller card come with many ports: Newegg.com
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post #3 of 5
Quote:
Originally Posted by ztec
first off sorry for starting another thread on this,i did a few search's but couldn't find what i needed to know...

anyway,when i built my pc about a month back, i looked into raptors and scsi drives but came to the conclusion it was abit to expensive for my needs .But lately on the bay there have been an abundance of scsi drives (well small gig ones),now i understand you need a controller card to use them,and that is the most expensive part (from looking at them new anyway)...i'll get more to the point i found a coulpe of seagate scsi drives (80pin) and basicly need to know these things:
1:how hard are the controller card to find?
2:is it just plug'n'play or can't it be an sob to install/get working?
3:will there be any benefits from scsi over sata2?
and last but not least
4:can raid be done on these drives and if so does it need a controller card or is it part of the above card ^^ ?

quite a few question i know ,any links to any info would be great help,thanks
One of my Rigs is a SCSI/IDE hybrid with a small gig (18) Cheetah 15K rpm 80 pin LVD/SE drive. I got a super deal on the drive and thought it'd be a piece of cake to install--wrong.

I got lucky with it being LVD/SE as these are the only drives to use on a desktop PC with a PCI controller card. The 80 pin interface is designed for a backplane that supplies power as well as the data. Cabling of backplanes is a black art and is TMI here--SCSI requires the use of a "Terminator" to keep data from bouncing back ad knocking new data out of synch in the HDD buffer. I twist 'n' fold SCSI cable rated for U320 is the best way to go, allowing many SCSI devices to be run from a single Host Bus Adapter (SCSI Card). The Backplane adapter is the key piece that will allow you to use 60 Pin SCSI cable to interface to the HBA. I bought 3 different ones all rated U320 LVD/SE before I got a real one. The only vendor I recommend is SCSI4ME.
Ditto that on cables and terminators--I bought lots of junk that did not work at all until I got the right stuff from SCSI4ME.

I went with an LSI U160 HBA--an affordable $40--sporting a 60 pin and 50 pin internal interface and a 60 pin external interface. Overkill for one drive.
I used a rounded 1 device U160 60 pin SCSI cable rated LVD/SE with an LVD/SE terminator. The 80 pin to 60 pin u320 LVD/SE backplane adapter has a molex connector for juice from the PSU and several jumpers that are not critical for a single-ended device. It is a fragile little circuit board and will not handle much fiddling without falling off the back of the HDD.

In order to load XP pro no floppy disk with drivers is required--Windows already has the drivers for most SCSI HBAs on tap. Some tinkering in the BIOS is required for the HBA to be configured as a Boot Device. And the in the HBA Config, the Device must also be selected as a Bootable device.

The 15K Cheetah is the fastest HDD around--and all that configuring was worth the effort--it outperforms my 2 WD250 SATA in RAID 0 in desktop responsiveness.

Please note that the HBA has it's own "BIOS" that may need to be flashed to fully support all the features of the particular SCSI drive it is hooked to. In my case I needed to reflash it it with the latest SymBIOS for LVD/SE functionality. Without that the Cheetah would only pump about 60mb/s transfer rate--instead of 160. Nonetheless due to its high RPM and low seek times it would still shred ATA drives.

Due to the small size I target "My Documents" and "Programs" to a larger IDE HDD (Maxtor ATA 133)--which keeps the C drive clean, lean and mean.

Hope that helps.
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post #4 of 5
Thread Starter 
well cheers for the info druid,i did a bit more research before people replied and found that inorder to use the 2 drives i have my eye on,i'd need 2 80 pin to 68 adaptors,a controller card (luckly the guy selling the drives has one which is perfect),and that lot will come near to the price of a 250gig wd sata2,so weighing out speed over size,right now i'd rather have the size,but cheers for the help
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Optical DriveCoolingCoolingCooling
Samsung SH-B123L Corsair H60 2x 140mm Aerocool Dead Silence intake fans 1x 180mm Phobya G-Silent 18 700rpm Slim Top Exh... 
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post #5 of 5
look to the raid 0 thread and check my post. 4 raptors will do for you.
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