I have tested two of the SSD's in my cMP 5,1. I put them - one at a time - into an Icy Box enclosure and installed them with the Windows SSD as the only other drive.
The cMP boots natively into Windows 10. I bring up Samsung Magician and the first two EVO 840's checked out good. HOWEVER, one of the 1 Tb SSD's reports as a 1.83 Tb drive. The other 1 Tb drive reports as a 2.3 Tb drive. The actual amount of data on each drive is well below the limit of the drive, under 50%. So, the directory maps have been hammered.
When the SSD's are installed in the G4, they interface through a FirmTek/SeriTek four port PCI card. The drives go directly to the card through SATA cables. The G4 reports the drives as SCSI drives. Although the drive size limits are essentially non-existent by doing that, I am trying to keep the sizes reasonable (186 Gb or less).
OS 9.2.2., OS 10.4.11, and OS 10.5.8 can all see the drives and work with them. 9.2.2 is limited as to doing more than just getting or copying files to the 10.4.11 and the 10.5.8 partitions, and 10.5.8 can't use any of the 9.2.2 programs.
I did have 10.4.11 using a classic copy of 9.2.2 installed on the 10.4.11 partition. It had been that way for several years with no problem. It was a bit slow, but very reliable.
Recently, I installed 9.2.2 on one of the 1 Tb drives in its own partition - formatted in extended, but not journaled. I had 10.4.11 use that when running in Classic mode. That ran like a scalded cat. And when running in 9.2.2 mode natively, it runs even faster.
In terms of drive repair software, the newest version of DiskWarrior that I have is DVD Rev. 810. That uses OS 10.5.3. I have to be careful with it on 9.2.2. It does have the best directory map repair capability.
The next newest disc that I have is ver. 3.0, OS 10.2.3, that is my pretty much universal go to for 9.2.2 and 10.4.11. It is no good for 10.5.8.
I will look for and try to buy a copy of Version 4 (unless that is the same as DVD Rev. 810).
In addition, I have Drive Genius 2 which is very good in some areas not covered by DiskWarrior.
Two or three years ago I was able to use TestDisk to fix the directory map on a hard drive on the G4. Unfortunately, the drive was going bad and failed just a bit after that. TestDisk, is a white knuckles, make sure everything is perfect, because if it isn't, there's no going back, sort of software.
I can do testDisk, though I'd rather not.
When I put in either Disk Warrior or Drive Genius, the programs get to a certain point and the beach ball just seems to sit and spin forever. It is possible that I have not been patient enough.
In terms of the G4 hardware, the processor is a 1 GHz Sonnet upgrade sitting on the Rev. 2 motherboard (the second one for the Sawtooth (AGP) G4's that allows for the installation of a dual processor upgrade. The RAM is matched 256 Mb 1333 to give 1 Gb of memory.
Other than the internal speaker shorting out - external works fine - there have been no hardware problems, other than the usual of having to replace power supplies now and then. The SSD's don't put as much load on it, so I think it should be good to go for a while longer.
I have the standard video card going via the DVI port to an HP24 display. The image is a bit spread out, but I have not looked at ways to correct that just yet. The mouse is a Kensington four button trackball with scroll ring. The keyboard is a general Walmart wired PC keyboard - not wonderful, but it will do until I can afford another extended keyboard and a Wombat interface (I have a Tinkerboy interface for the Extended that I do have, but it has some keys that don't function, and the number pad does not seem to work (Tinkerboy interface?)).
I've been concerned about not messing with the SSD's because I don't have good knowledge about how much I can try before they give up. I was not sure that I would not ruin a card just by putting it in the cMP. So I took the one with the least information (least loss if everything went wrong) and tried it.
The Samsung Magician software (which I run under Windows 10 on the cMP) gave the first SSD a relatively clean bill of health, except for reporting that the size was screwy and way over the actual size. The amount of information on each card (after the first one, I tried another. I've yet to try the third) seemed about right. So it appears to confirm corrupted maps.
I will be glad to answer any further questions or try different things. Let me know what information to supply.