Ubuntu :: What Is Hard Drive Letter

I can not find my hard drive letters in ubuntu. In the "computer" window it just shows it as "file system". I want to run chkdsk on another hdd that I connected to the computer. It shows up as 2 icons, one called "256 GB Solid-State Disc:256GB Filesystem and the other called "256 GB Solid-State Disc:System Reserved. This disc was installed in another computer as the only hdd and I had problems with the computer so I removed it and installed disc drive. I want to check this ssd here in ubuntu to see if there are any bad sectors etc. All the instructions I can find say to Type "Run chkdsk /[drive letter]" (without quotes) in the terminal win. I entered "sudo lshw" and the drive shows as "*-disc:1" I tried using 1, disc-1 and *-disc:1 as drive letters , example, "Run chkdsk/1" (without quotes), and I get command not found for all 3. There must be a drive letter to these discs as in windows I would guess, it appears that way as I search the net. NOTES, this computer has ubuntu 10.04 installed only and has 3gb native sata mobo, no microsoft at all. I want to check the quality of this ssd as much as possible and can overwrite or delete any and all files on it, reformat it etc. If it checks out good, I may remove the existing hdd on the computer and install this one as the only hdd and install ubuntu and use it a while to make sure it works fine, then remove it and install it to the original computer where i wanted it in the first place. That computer has win7 ultimate on it, but what matters is that one has the 6gig native sata mobo and that is where this ssd will work at its fastest