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Old 28 December 2017, 19:06   #1
antiriad76
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Looking storage alternatives for G-Force 030 with SCSI

My A2000 main HDD is experiencing some issues. It seems the SCSI HDD is getting stuck doesn't always spinning when powered on.

It has a 500MB 50-Pin SCSI and I might be looking for a "new" drive however it seems there any not many options for anything above 5GB.

I was searching around for any possible alternatives and it seems like the SCSI2SD might be a viable solution but for some crazy reason the adapters are for $100+. This is crazy considering the fact that the IDE to SD Adapter can also be bought for a few dollars.

Why are these still so expensive.

Any other alternatives?

Thanks

Mike
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Old 28 December 2017, 19:24   #2
kgc210
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Quote:
Originally Posted by antiriad76 View Post
I was searching around for any possible alternatives and it seems like the SCSI2SD might be a viable solution but for some crazy reason the adapters are for $100+. This is crazy considering the fact that the IDE to SD Adapter can also be bought for a few dollars.

Why are these still so expensive.

Any other alternatives?

Thanks

Mike
I guess it's down to supply and demand?
Also more stuff going on in SCSI?

You can get SCSI to IDE and SCSI to CompactFlash (IDE with a different connector)
But they are about the same price if not more.

If you get a SCSI2SD bear in mind the v6 can run faster depending on your host controller than the older v5.
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Old 28 December 2017, 20:19   #3
patrik
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There are atleast two Acard (ARC760 chip) based alternatives using CF cards. These are very fast and compatible (UltraSCSI 20MB/sec capable).

CF AztecMonster
SCSI Disk
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Old 29 December 2017, 12:59   #4
kgc210
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You can also get the second one $5 cheaper off their website.
http://zahermusic.com/store/products...lid-State-Disk
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Old 29 December 2017, 18:55   #5
patrik
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@kgc210: Good catch, didn't manage to find that one
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Old 30 December 2017, 05:30   #6
antiriad76
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It seems there is a V5 and a V6. Is the V6 going to make much difference in the Amiga?

The V6 is supposed to be "Faster"
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Old 30 December 2017, 09:46   #7
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Really depends on the Amiga. The fastest SCSI adapters from the mid 90s might see a difference. CyberSCSI mk2 or CyberStorm MK3/PPC.
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Old 30 December 2017, 14:53   #8
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Every controller that can benefit from synchronous SCSI mode will be much faster with a v6. Synchronous mode must be enabled either by setting in RDB or controller/driver-specific setting.

I have an A2000 with a GVP G-Force 030, which I understand is supposed to support synchronous mode, especially as it is equipped with a GuruROM which has a specific setting for it. Unfortunately it has never made a difference, so I suspect there is some other bottleneck limiting the transfer rate for this card.

For example on an A3000 which has the same SCSI interface chip as the GVP card, you usually get a 50%+ transfer rate increase when enabling synchronous mode for devices supporting it.

To give some figures: with an old 2047MB Seagate it increases from ~2.2MB/sec to ~3.6MB/sec and with an Acard bridge it increases from ~2.1MB/sec to ~3.2MB/sec.

References (basing the above numbers on the 256kB FastMem test):
A2000-GVP Acard bridge Async
A2000-GVP Acard bridge Sync
A3000 Seagate 2047MB Async
A3000 Seagate 2047MB Sync
A3000 Acard bridge Async
A3000 Acard bridge Sync

Last edited by patrik; 31 December 2017 at 03:11.
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