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Old 13 December 2019, 11:45   #401
fgh
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It depends on what you are doing on the amiga but in general write speed is much less important than read speed on amiga use cases nowadays.
You’ll have both random and sequential reads, again depending on what you do.

Not having moving parts (= seek time) often contributes as much as the increased top speed of your flash media towards the percieved speed increase vs old harddrives though.

And a 20mb/s rated card doing 0,1mb random writes sounds unusually slow.
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Old 13 December 2019, 23:54   #402
jbenam
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Quote:
Originally Posted by fgh View Post
It depends on what you are doing on the amiga but in general write speed is much less important than read speed on amiga use cases nowadays.
You’ll have both random and sequential reads, again depending on what you do.

Not having moving parts (= seek time) often contributes as much as the increased top speed of your flash media towards the percieved speed increase vs old harddrives though.

And a 20mb/s rated card doing 0,1mb random writes sounds unusually slow.
Not much really, just extracting archives, WHDLoad and a bit of random programs here and there.

This is an old Samsung 16GB SSD I had laying around. I was wondering if it was worth putting it in my A4000 in place of my current CF.

So I benchmarked it and I got sequential R/W speeds of 100/50 MB/s respectively, and then 25 MB/s for random reads, while random writes are just 0.2MB/s. I've just rechecked it on another PC and I got the same result. I'll try to benchmark my CFs and SDs for random writes when I get a bit of time.
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Old 25 January 2020, 15:00   #403
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My ACA500+ has just arrived. I can't use it though, because I was dumb enough to confuse CF cards (which I have 0 of) with SD cards (which I have plenty of). Basically, I have been using only SD/MicroSD for so long now that I forgot there's another standard in town.

So now I have to sort this out, but quick look at the prices got me a bit worried. These things are not cheap, and my budget is already a bit shaky after ACA itself. Do you think I could get away with just buying a couple of CF -> SD adapters? Do these things work in this scenario?
And could I then read the SD card via WinUAE in my PC? I have the SD -> USB adapter but would have to buy the CF ->USB one.
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Old 25 January 2020, 15:17   #404
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I use a CF-SD adapter in my ACA500plus and it works fine. And yes, you can just take the SD card out and read that in the PC.
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Old 25 January 2020, 16:41   #405
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Thanks! I will give it a whirl then, save a chunk of cash this way.
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Old 13 February 2020, 07:21   #406
A500
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Quote:
Originally Posted by Toni Wilen View Post
16G and 32G "silver" Sandisk Ultra 50MB/s CF cards (https://www.sandisk.com/home/memory-...a-compactflash) use "illegal" CHS geometry = full capacity is available without scsi.device update with DirectSCSI filesystem.

16G confirmed here: http://eab.abime.net/showthread.php?t=85688
I ordered 32G version after I saw above post, it arrived today and I can confirm that it also uses "illegal" CHS geometry. (62041/16/63, "HDX13.04SDCFHS-032G")

Thank you very much for this information Toni! I have two such CF cards (16Gb), and they kept showing partitions over 4Gb as NDOS after partitioning, formatting, installing WB3.1 and rebooting under PFS3AIO3.0 + SCSI.DEVICE 44.20, the latter of whicih I obviously used to avoid the same problem.

Just to be clear, with PFS3AIO 3.0 and scsi.device 40.12 everything works fine. I made two partitions, 512Mb for System: and the rest of the 16Gb card as the second partition. Thanks again!

Last edited by A500; 13 February 2020 at 07:27.
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Old 13 February 2020, 09:23   #407
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scsi.device V44 does not avoid anything. It's a hack, it is buggy and it is confirmed to make hardrives disappear.

What you need to fix the 7.8 GB issue is either scsi.device V43.43 from OS3.9BB2, possibly with Toni's LBA48 patch, or scsi.device V46 which is part of OS 3.1.4.
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Old 13 February 2020, 21:28   #408
A500
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Originally Posted by thomas View Post
scsi.device V44 does not avoid anything. It's a hack, it is buggy and it is confirmed to make hardrives disappear.

What you need to fix the 7.8 GB issue is either scsi.device V43.43 from OS3.9BB2, possibly with Toni's LBA48 patch, or scsi.device V46 which is part of OS 3.1.4.

Thank you Thomas, good to know! I'm still quite new to using CF cards as Amiga HD so all information is most welcome.
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