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Author Topic: Partition sizes for Amiga OS 3.1 (SCSI)?  (Read 5487 times)

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Offline blakespotTopic starter

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Partition sizes for Amiga OS 3.1 (SCSI)?
« on: August 24, 2014, 09:03:31 PM »
Software or a hardware question? Hmm.

I have a 700MB SCSI HD on my GVP HD+8 SCSI controller in my A2000 w/ OS 3.1. I need to add a bigger disk. What is the max partition size under OS 3.1, ROM 3.1? Will a 40GB, 80GB, etc. disk work (even if nowhere near that space needed)?

Things to look out for? The Quantum drive I have is circa 1994. More modern drives present issues?

Thanks.



bp
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Offline blakespotTopic starter

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Re: Partition sizes for Amiga OS 3.1 (SCSI)?
« Reply #1 on: August 25, 2014, 04:10:10 AM »
So I have this 7,200 RPM Seagate 4GB SCSI drive laying around.

SCSQuery tells me it has 6300 cylinders. It has 8 heads. How do I calc for HDToolBox Blocks / Track, Blocks / Cylinder to get a full 4GB? Interleave is 1.

I enter 6300 cylinders, but it changes nothing - I hear that #, tho it is in an editable field, is calculated by the other two values I mentioned.

Thanks.

Drive is a Seagate Barracuda ST34572WC.


bp
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Offline blakespotTopic starter

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Re: Partition sizes for Amiga OS 3.1 (SCSI)?
« Reply #2 on: August 25, 2014, 10:53:17 AM »
I had it Read Configuration and while the vendor info is accurate, the physical attrib returned call it a 23MB drive. It is a 4GB drive. (Returns 1 head instead of 8, etc.)


bp
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Offline blakespotTopic starter

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Re: Partition sizes for Amiga OS 3.1 (SCSI)?
« Reply #3 on: August 25, 2014, 08:55:56 PM »
Quote from: Thomas;771736
Please post all values as read by Read Configuration.

If the drive is 4119 MB, it will be shown as 23 MB because everything above 4GB (= 4096 MB) is cut off.

I will do so once I get back into town - out on vacation until Thurs evening. Thanks.


bp
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Offline blakespotTopic starter

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Re: Partition sizes for Amiga OS 3.1 (SCSI)?
« Reply #4 on: August 25, 2014, 09:01:51 PM »
Something I noticed. Here is a picture from the 'net of the same drive (same model #):

http://www.4drives.biz/images/DRIVEPICTURES/IBM_02K3404.jpg

It says 4.51GB USCSI. My drive says 4GB SCSI in the same place. I see more references to this model being 4.5GB than 4GB. I wonder why my drive is labelled as such? Two drives with same model # differing by .5GB seems odd.

My drive came in an SGI O2 and HDToolBox's Read Configuration reports both Seagate and SGI in the text details.

It seems I may have a 4.5xGB drive. Steps, then?

Thanks.



bp
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Offline blakespotTopic starter

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Re: Partition sizes for Amiga OS 3.1 (SCSI)?
« Reply #5 on: August 28, 2014, 09:01:15 PM »
Ok, back in town. HDToolBox riding gvpscsi.device reports the following about this "4GB" drive after Read Configuration:

File Name: drive definitions
Manufacturer's Name: SGI
Drive Name: Seagate ST34572W
Drive Revision: 0878

Cylinders: 918
Heads: 1
Blocks Per Track: 9674
Blocks Per Cylinder: 9674

Size: 241225K (235MB)

Park Head Where? (Cylinder): 918

Information on this drive:
http://pbclub.pwcsite.com/PBInfo/PB%20Info%20Site/pb/harddrive1/34572wovw.asp.htm

Thanks for any help on this.


bp
« Last Edit: August 28, 2014, 09:02:43 PM by blakespot »
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Offline blakespotTopic starter

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Re: Partition sizes for Amiga OS 3.1 (SCSI)?
« Reply #6 on: August 29, 2014, 04:53:24 PM »
Thank you!

Now that that's sorted, 2GB is the max partition size for AmigaOS 3.1, yes?

I am using HDToolBox. I also have GVP's FaaaaaaastPrep app, can I ignore that in setting this up?

Thanks.



bp
:: ByteCellar.com - The Vintage Computing Weblog
:: Amigas: 1000, 2000 '020, SAM440ep-Flex