I can't say I've had any particular problem with using micro-SD cards in any Pi which plugs into Beebs (apart from Kingston ones regularly going on fire).
I agree that for PiTube, and for RGBtoHDMI, given that the firmware is only a few MB in total, it seems a waste to be using at 16GB+ card but it's getting difficult to find smaller capacity cards now.
Some of these cards are marketed as SDHC, SDXC etc. if that makes any difference to how they work.
Definitely the cards need to be formatted to FAT 32-bit, and not exFAT. I usually format a new card in the Ubuntu Disks utility and wipe the small partition of about 400MB that always seems to be at the beginning of freshly opened SD cards, and make a single partition of FAT 32-bit for the full extent of the card. Not sure if it makes a difference, I don't think it's essential.
What is the problem with Pi SCSI exactly? Is the whole thing just not recognised, or do the hard drives not work reliably?
I did have a problem where one of my LUNs wasn't working correctly in BeebSCSI, and PiSCSI, and this was diagnosed and fixed by Dominic as a heavily fragmented scsi.dat file (over 16,000 fragments!) causing the BeebSCSI fast seek to fall over as it couldn't cope with that many chunks. This was fixed in PiSCSI I think by fast seek being disabled if it encounters an image file with masses of fragments. Obviously the simple solution there is to check for file fragmentation on the card, it won't, or shouldn't, happen once the card is in the Pi but may happen when copying image files to the card beforehand.
I agree that for PiTube, and for RGBtoHDMI, given that the firmware is only a few MB in total, it seems a waste to be using at 16GB+ card but it's getting difficult to find smaller capacity cards now.
Some of these cards are marketed as SDHC, SDXC etc. if that makes any difference to how they work.
Definitely the cards need to be formatted to FAT 32-bit, and not exFAT. I usually format a new card in the Ubuntu Disks utility and wipe the small partition of about 400MB that always seems to be at the beginning of freshly opened SD cards, and make a single partition of FAT 32-bit for the full extent of the card. Not sure if it makes a difference, I don't think it's essential.
What is the problem with Pi SCSI exactly? Is the whole thing just not recognised, or do the hard drives not work reliably?
I did have a problem where one of my LUNs wasn't working correctly in BeebSCSI, and PiSCSI, and this was diagnosed and fixed by Dominic as a heavily fragmented scsi.dat file (over 16,000 fragments!) causing the BeebSCSI fast seek to fall over as it couldn't cope with that many chunks. This was fixed in PiSCSI I think by fast seek being disabled if it encounters an image file with masses of fragments. Obviously the simple solution there is to check for file fragmentation on the card, it won't, or shouldn't, happen once the card is in the Pi but may happen when copying image files to the card beforehand.
Statistics: Posted by BeebMaster — Sat Dec 14, 2024 11:46 am