Longevity of CF Cards, i.e., TRIM

[mechy]

Thanks, glad to hear it!  I've been only using them for the past year and while I have found CF cards to be bus limited, SD cards are not; but then I've only used cheap ones. Due to the swap partition of OS 4.1, I've moved to an UW SCSI drive  for it. As SSD prices have fallen I've played with one on my PCI SATA card plus a modern DVD-RW.

I have been using sandisk,transcend and kingston cf's on my amigas. my main amiga csppc has 2-sandisk 32Gb cf's and it pulls around 32MB/s on the csppc scsi with acard 7720UW's.. its been running for at least 8 years+ like this with no failures.

I've sold 1260 used transcend 80x  2Gb cards over the last years and not one has been returned as defective. not to say none failed,but i would think people would of told me for sure.

With cheap cards its a gamble . There are so many knockoffs on ebay i would estimate 40% are fakes at least. if its way way cheaper than you can find them for be suspicious. genuine cards have the numbers printed on the rear edge usually and can be verified from the mfg.

the problem with sd is its serial,while a cf is a true ide interface. i find sd generally slower than cf's..

mech

[mechy]

Yeah but my A4000T is limited in OS 4.1 to 128MB of ram which, after loading workbench is then cut to half that. When it runs out of CSPPC memory it first hops to my 256MB ZorRam card, and when that is done to hard drive. While I can put a CF card on the IDE bus (damn slow compared to the CSPPC) to get a CF card on the SCSI bus (and only the CSPPC bus it really usable) takes 2 adapters (Acard to IDE then IDE to CF) which, when the speed is tested is much slower than CSPPC to SCSI UW hard drive.

Granted I use the CF cards for quick backups of boot partitions and such, I just wanted to know from this thread if over the next 27 years if I should archive my CF cards like I now do with my SCSI drives.

Geit:  I've checked speed between a X266 and an X600 CF card and they are bus limited on the Amiga (CSPPC Wide SCSI bus) as is a SATA III SSD drive; it just so happens at this point in time a 120GB SSD is cheaper by far than even a CF card; hence the origin of my question on longevity and TRIM technology. We can't all work with electronics and computers for a living so questions arise that can't just be Googled

Well, something is wrong.Are you using SFS? FFS is horrible. I am getting 32MB/s+ on a sandisk card on 7720uw+ide cf adapter under os4. All cf adapters are not wired right,and your card /adapter needs to support dma. also are you running the scsi bus in synchronous mode? I dont know anyone who has attained 40MB/s on a csppc,but i've been close with 15K seagates with big buffers. I havent tried the latest cf's so it may run close with them as well.