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| Author | PowerMac 5500 CF data corruption (Read 24096 times) | ||||||||||||||||||||||||||||||||||
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Knezzen
Administrator 512 MB  Posts: 608 Village idiot 
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on: April 05, 2021, 16:33
Hi! I'm having issues with my 5500 with CF cards bigger than 4GB. Thinking that there's something wrong with my CF to IDE adapter I got a "good" one instead of the cheap chinese one I had before, but the issues persist. Wondering how to solve this and if it is a drive or partition issue. I stumbled upon a Low End Mac article about the TAM and it having quite common issues with drives bigger than 4GB. The 5500 shares platform with the TAM, so it should be affected as well. How big drives are you guys using with 7.6.1 without any issues? |
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oldeuser
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4 MB  Posts: 6 System 7 Newcomer!
Reply #1 on: April 05, 2021, 17:41
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I am not sure about 7.6.1 but with System 7.5 the largest partition size is 4GB. The largest hard drive size would probably be much larger (I think but am not sure but I beleive that ATA66 can handle up to 128GB drives), but when you setup the hard drive you will need to make sure that no partition exceeds 4GB in size. I assume if you partition you 4GB card into 2 2GB partitions you will have no problems. bill
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cballero
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1024 MB Posts: 1176 System 7, today and forever
Reply #2 on: April 05, 2021, 21:04
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Are these CF cards are removable via a PCMCIA card slot or is this for an internal CF drive adapter? Just curious  I ask because if it's removable, maybe they can have HFS and HFS+ partitions as well, if this can make it more versatile with various Mac systems.
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Europa
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64 MB Posts: 109 she/her
Reply #3 on: April 08, 2021, 04:10
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I have an 8GB card in my PowerBook 1400 (internally) and it has suffered no data corruption as far as I can tell. I'm running 7.6.1 and 8.1 on it. I would think that it could be the platform like you mentioned, as I am having no issues with mine and we seem to be running similar setups otherwise.
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Bolkonskij
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Administrator 1024 MB Posts: 2023
Reply #4 on: April 08, 2021, 09:14
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Yeah, Europa, but you have a SCSI2SD I suppose? Like me and I have no issue whatsoever. (I've got 4 partitions roughly รก 2 GB on my 8600). I had already suggested getting a SCSI2SD but Knezzen's SCSI2SD only got IDE. Ah, well. So maybe you should indeed keep looking for a decent UMAX machine, Knezzen ;-)
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Europa
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64 MB Posts: 109 she/her
Reply #5 on: April 09, 2021, 14:58
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No, it's a CF <-> IDE adapter. Sorry, should have clarified that. >.> The 1400 uses IDE internally, which is super useful for me! 
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Bolkonskij
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Administrator 1024 MB Posts: 2023
Reply #6 on: April 09, 2021, 17:51
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aha, so that changes things. Might be indeed a hardware thing then. Umax, ftw!
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Europa
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64 MB Posts: 109 she/her
Reply #7 on: April 10, 2021, 16:54
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Just found something interesting. I was comparing the PowerBook 1400 and the Power Mac 5500 in MacTracker, trying to see if I could spot anything. The 1400 uses ATA-2 while the 5500 uses ATA. I wonder if there's something there that could be causing issues. Looking at the Wikipedia article, it states that the ATA-2 standard was the first one to acknowledge that more than just hard drives could be connected to the bus. That makes me wonder if support was always there but undocumented or they specifically added support for non-hard disk drive devices in ATA-2 and if that would make a difference for something that isn't technically a hard disk drive but is serving the purpose of one for all intents and purposes, like the CF card in question is. As a side note, it looks like ATA-2 also was the first one to introduce the PCMCIA connector, which might be relevant considering the prevalence of CF to PC Card adapters.
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Knezzen
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Administrator 512 MB Posts: 608 Village idiot
Reply #8 on: April 11, 2021, 11:27
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Well, both my Atari Falcon and Amiga 600 can use CF cards without any issues. I'm thinking it might be that the 5500 has a buggy IDE controller. I have a SATA combo card on order, so it will probably get a SATA SSD in the near future so I can bin the awful CF card  The card is a combo USB/FireWire/SATA single PCI card. Might be the ultimate upgrade for any single PCI slot system. So it will give me the ability to investigate USB support on 7.6.1 a bit further as well.
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