AlessandroB wrote on 2023-12-24, 15:42:

I am experimenting (thanks to the advice of some of you) using SCSI in my computers and to be precise they are the following: […]
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I am experimenting (thanks to the advice of some of you) using SCSI in my computers and to be precise they are the following:

1)PS/2 model 30 286 - I use XT IDE and everything works - I don't think SCSI is needed. Dos6.22

2)PS/1 386 - I use its standard IDE hard disk - it has a slow SX25Mhz CPU, I don't think SCSI gives great benefits in the end, I think this computer is too limited by the CPU. Dos6.22

3) IBM PC 330DX4 - on this computer I would like to use SCSI and I have ordered an Adaptec 1542CF to which I will connect a Hitachi 74Gb 15k disk (I have 3 identical disks that I will use for all my scsi configurations). Dos6.22 - win3.11

4) IBM PC330 P60 - on this computer I think of leaving the IDE controller on the mainboard as it will be a computer used to "see how some games work on a first generation Pentium", it will be used very little. Win95

5) IBM PC330 P200 - This computer together with the DX4 will be the spearhead of my retrogame and I purchased an Adaptec 2940U2W to install with the same disk described above. win98

6) IBM PL PentiumII/III - This computer is used for DOS games that are too heavy for the Pentium200, I'm undecided whether to fit a SCSI controller, what do you recommend yes or not? win98

7) IBM Netvista Pentium4 - On this computer I don't think about mounting a SCSI controller, it would be used as a DOS Game PC killer, at most if I really get fed up with the slowness of the IDE disk I will mount an SSD. win98

skipping this list for now.

It would be nice to also try other operating systems such as IBM PS/2 or WinNT4 but I can only fit one hard disk inside all the computers and I wouldn't want to reformat everything every time,

I think you mean OS/2

I was thinking of getting an external SCSI box to install the systems (winNT, PS/2 ecc) , in your opinion is this a viable option or will I have SCSI-S.O. controller compatibility problems?

SCSI-S.O. ? what does that mean ?

and again: if I take a 50 pin SCSI external box, will I be able to connect it effectively to both the 1542CF and the 2940U2W and perhaps to the 29160?

If you have the correct cables/ cables&adapters, it should not be a problem.

Thanks for all your replies

enjoy.

weedeewee wrote on 2023-12-24, 16:11:

skipping this list for now. […]
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AlessandroB wrote on 2023-12-24, 15:42:

I am experimenting (thanks to the advice of some of you) using SCSI in my computers and to be precise they are the following: […]
Show full quote

I am experimenting (thanks to the advice of some of you) using SCSI in my computers and to be precise they are the following:

1)PS/2 model 30 286 - I use XT IDE and everything works - I don't think SCSI is needed. Dos6.22

2)PS/1 386 - I use its standard IDE hard disk - it has a slow SX25Mhz CPU, I don't think SCSI gives great benefits in the end, I think this computer is too limited by the CPU. Dos6.22

3) IBM PC 330DX4 - on this computer I would like to use SCSI and I have ordered an Adaptec 1542CF to which I will connect a Hitachi 74Gb 15k disk (I have 3 identical disks that I will use for all my scsi configurations). Dos6.22 - win3.11

4) IBM PC330 P60 - on this computer I think of leaving the IDE controller on the mainboard as it will be a computer used to "see how some games work on a first generation Pentium", it will be used very little. Win95

5) IBM PC330 P200 - This computer together with the DX4 will be the spearhead of my retrogame and I purchased an Adaptec 2940U2W to install with the same disk described above. win98

6) IBM PL PentiumII/III - This computer is used for DOS games that are too heavy for the Pentium200, I'm undecided whether to fit a SCSI controller, what do you recommend yes or not? win98

7) IBM Netvista Pentium4 - On this computer I don't think about mounting a SCSI controller, it would be used as a DOS Game PC killer, at most if I really get fed up with the slowness of the IDE disk I will mount an SSD. win98

skipping this list for now.

It would be nice to also try other operating systems such as IBM PS/2 or WinNT4 but I can only fit one hard disk inside all the computers and I wouldn't want to reformat everything every time,

I think you mean OS/2

I was thinking of getting an external SCSI box to install the systems (winNT, PS/2 ecc) , in your opinion is this a viable option or will I have SCSI-S.O. controller compatibility problems?

SCSI-S.O. ? what does that mean ?

and again: if I take a 50 pin SCSI external box, will I be able to connect it effectively to both the 1542CF and the 2940U2W and perhaps to the 29160?

If you have the correct cables/ cables&adapters, it should not be a problem.

Thanks for all your replies

enjoy.

yes i mean os/2, i ask if i will have problem related driver on the os/2 and winNT for exhample, but is easy to try….

check the list whe have time. tnks

AlessandroB wrote on 2023-12-24, 17:00:

weedeewee wrote on 2023-12-24, 16:11:

skipping this list for now. […]
Show full quote

AlessandroB wrote on 2023-12-24, 15:42:

I am experimenting (thanks to the advice of some of you) using SCSI in my computers and to be precise they are the following: […]
Show full quote

I am experimenting (thanks to the advice of some of you) using SCSI in my computers and to be precise they are the following:

1)PS/2 model 30 286 - I use XT IDE and everything works - I don't think SCSI is needed. Dos6.22

2)PS/1 386 - I use its standard IDE hard disk - it has a slow SX25Mhz CPU, I don't think SCSI gives great benefits in the end, I think this computer is too limited by the CPU. Dos6.22

3) IBM PC 330DX4 - on this computer I would like to use SCSI and I have ordered an Adaptec 1542CF to which I will connect a Hitachi 74Gb 15k disk (I have 3 identical disks that I will use for all my scsi configurations). Dos6.22 - win3.11

4) IBM PC330 P60 - on this computer I think of leaving the IDE controller on the mainboard as it will be a computer used to "see how some games work on a first generation Pentium", it will be used very little. Win95

5) IBM PC330 P200 - This computer together with the DX4 will be the spearhead of my retrogame and I purchased an Adaptec 2940U2W to install with the same disk described above. win98

6) IBM PL PentiumII/III - This computer is used for DOS games that are too heavy for the Pentium200, I'm undecided whether to fit a SCSI controller, what do you recommend yes or not? win98

7) IBM Netvista Pentium4 - On this computer I don't think about mounting a SCSI controller, it would be used as a DOS Game PC killer, at most if I really get fed up with the slowness of the IDE disk I will mount an SSD. win98

skipping this list for now.

It would be nice to also try other operating systems such as IBM PS/2 or WinNT4 but I can only fit one hard disk inside all the computers and I wouldn't want to reformat everything every time,

I think you mean OS/2

I was thinking of getting an external SCSI box to install the systems (winNT, PS/2 ecc) , in your opinion is this a viable option or will I have SCSI-S.O. controller compatibility problems?

SCSI-S.O. ? what does that mean ?

and again: if I take a 50 pin SCSI external box, will I be able to connect it effectively to both the 1542CF and the 2940U2W and perhaps to the 29160?

If you have the correct cables/ cables&adapters, it should not be a problem.

Thanks for all your replies

enjoy.

yes i mean os/2, i ask if i will have problem related driver on the os/2 and winNT for exhample, but is easy to try….

check the list whe have time. tnks

From the list
- Adaptec 1542CF to which I will connect a Hitachi 74Gb 15k disk
- Adaptec 2940U2W

Since you already had a bios drive size limit issue with the U2W, You can be damn sure you will have an issue with the 1542CF and the 74G disk. This will likely mean you will not have easy access to the full size in dos
I know there's a thread here on vogons, Showing some love for Adaptec's ugly ducklings: Adding big drive support to EISA and VL controllers . Though that doesn't apply to the 1542CF
This Bios issue will probably also show itself in the drivers for the various Operating systems you are going to try. Try it all out and make a thread about it. 😀

Yes SCSI is a reliable and robust way of being able to swap your boot hard disk into a system without having the take the system apart every time you want to swap out the drive.

The connectors are robust enough to survive multiple connect/disconnects and to the SCSI bus it doesnt matter if its on the internal or external connector of the card.
I did this exact thing for quite a while back when I first got Windows 2000 because much of the software I had was on NT4 but I wanted to use Windows 2000.

I fitted a ribbon cable to the back of the PC that had an internal 68pin connector on one end and a 68pin external connector on the other that put the internal SCSI U160 connector of the motherboard on the rear IO, I just swapped the external hard drive cases in and out as I wanted to.
It took a few seconds to unplug the cable from the drive and plug in the Windows 2000 hard drive.
After a while I got a second SCSI LVD terminator so I didnt even have to swap that out anymore because the one I had the plastic casing was starting to come unstuck from the connector.
That was the only problem I ever had with it, and i did that for a year or two before moving full time over to WIndows 2000.

ElectroSoldier wrote on 2023-12-24, 19:12:

Yes SCSI is a reliable and robust way of being able to swap your boot hard disk into a system without having the take the system […]
Show full quote

Yes SCSI is a reliable and robust way of being able to swap your boot hard disk into a system without having the take the system apart every time you want to swap out the drive.

The connectors are robust enough to survive multiple connect/disconnects and to the SCSI bus it doesnt matter if its on the internal or external connector of the card.
I did this exact thing for quite a while back when I first got Windows 2000 because much of the software I had was on NT4 but I wanted to use Windows 2000.

I fitted a ribbon cable to the back of the PC that had an internal 68pin connector on one end and a 68pin external connector on the other that put the internal SCSI U160 connector of the motherboard on the rear IO, I just swapped the external hard drive cases in and out as I wanted to.
It took a few seconds to unplug the cable from the drive and plug in the Windows 2000 hard drive.
After a while I got a second SCSI LVD terminator so I didnt even have to swap that out anymore because the one I had the plastic casing was starting to come unstuck from the connector.
That was the only problem I ever had with it, and i did that for a year or two before moving full time over to WIndows 2000.

my project is to "add" an external drive to the computer in wich want to try a new operating system, leaving the internal cable and hard disk as is and choosing via scsi bios everytime in wich drive i want to install (internal or external) or i want to boot the computer.

AlessandroB wrote on 2023-12-25, 01:23:

ElectroSoldier wrote on 2023-12-24, 19:12:

Yes SCSI is a reliable and robust way of being able to swap your boot hard disk into a system without having the take the system […]
Show full quote

Yes SCSI is a reliable and robust way of being able to swap your boot hard disk into a system without having the take the system apart every time you want to swap out the drive.

The connectors are robust enough to survive multiple connect/disconnects and to the SCSI bus it doesnt matter if its on the internal or external connector of the card.
I did this exact thing for quite a while back when I first got Windows 2000 because much of the software I had was on NT4 but I wanted to use Windows 2000.

I fitted a ribbon cable to the back of the PC that had an internal 68pin connector on one end and a 68pin external connector on the other that put the internal SCSI U160 connector of the motherboard on the rear IO, I just swapped the external hard drive cases in and out as I wanted to.
It took a few seconds to unplug the cable from the drive and plug in the Windows 2000 hard drive.
After a while I got a second SCSI LVD terminator so I didnt even have to swap that out anymore because the one I had the plastic casing was starting to come unstuck from the connector.
That was the only problem I ever had with it, and i did that for a year or two before moving full time over to WIndows 2000.

my project is to "add" an external drive to the computer in wich want to try a new operating system, leaving the internal cable and hard disk as is and choosing via scsi bios everytime in wich drive i want to install (internal or external) or i want to boot the computer.

Yes you can do that no problem.