redglen wondah christopher
Rosalie Checca
I'm getting working experience as hardware tech guy meaning I have to repair and fix used computers daily. One of those tasks is formatting all the hard disks and we use Killdisk active@, at Work for erasing all the data.
Active@ also has a data recovery option which is one of my favorites. -recovery.com/ It's thorough, often produces results even after an entire format and partial over write. I've used this tool hundreds of times on client's deleted/lost/formatted family photos, dissertations, etc...
A commonly known one is Recuva. Not my favorite since it takes an extremely long time to scan especially since the "Deep Scan" option is the only one that seems to produce any results. It's handy when you know exactly what your looking for and need/want a live program rather than a bootable one.
All this to say that data wiping/formatting is mostly effective when drives have been wiped and over written several times, redundantly. I've never used Active@ KillDisk (My personal preference is D.B.A.N.) but surely it has various degrees of wiping.
If someone is trying to steal banking passwords, identities, etc... they aren't going to be buying USED computers in hopes that forensic level data recovery will produce thousands of fragments of data. That they then have to sifted through to see if it's enough information (assuming it exists at all) to allow them to JUST begin the real crime.
I had some personal stuff on my computer that i wanted to erase. It was scattered everywhere so i purchased killDisk to wipe the entire thing. I installed, paid and registered, made their boot disk and erased entire hard drive. I thought the boot disk would get me back in and take me to win os 10. NOT SO.
You can use the HP cloud recovery tool on another Windows PC running Windows 7 64 bit or newer to create a bootable USB recovery drive that will reinstall W10, the drivers and the software that originally came with your PC.
This article describes the process of changing the location where the killdisk erase certificates are saved. They can be saved to a specific directory, network share, or configured to print automatically.
The program can be run from Windows (use it only on drives withno open or active files) or it can be used to create bootable CD orfloppy disks. Once booted, the program can wipe Windows, DOS, or*nix drive partitions.
Thanks everyone for the suggestions. I tried them all and could not kill the unwanted partition. I eventually took the drive back to the store where I bought it and then bought a vanilla 1TB external drive.
The drive will be in FAT-32 format which is good for data storage, but if you have some particular need for it to be in
NTFS mode, windows will easily do that for you, once you return the drive to the external enclosure.
The PRO about this fix is that the CDFS will be removed and the CON is that the LED FROM THE EXTERNAL HARD DRIVE WILL NOT WORK (THE HARD DRIVE IS STILL FUNCTIONAL) AND I DO NOT KNOW WHY. IF YOU CARE ABOUT THE FLASHING LIGHT, DO NOT PROCEED WITH THIS FIX!
IF YOU ARE AN EXTREME RISK TAKER OR REALLY DESPERATE, PROCEED WITH THE FIX BUT I STRONGLY RECOMMEND THAT YOU RETURN THE HARD DRIVE AND BUY A GENERIC EXTERNAL HARD DRIVE!
7A. So what we did with the Clickfree Hard Drive is that we programmed the JMS539 Bridge controller to bridge the connection directly to the hard drive and not to the Nand Chip that carries the CDFS partition.
10. What I strongly Recommend for formatting External Hard Drive is to use a Linux Distro, GParted. However , if you want to use a third party formatting tool or use disk management, you can proceed with that . if you want to use my recommendation, here is the link to the iso And click on the Live CD/USB tab to guide you putting the iso on a cd or usb.
The removal process is for removing the partition of certain clickfree drives. I have an older drive that has the same crazy frustrating software. Is there firmware that can remove this partition from the 100 gb drive. The firmware of the drive is 7.31. I have tried the firmware of the for the click free drive you listed but it would not recognize the chip on my drive so obviously it is the wrong firmware version. the model is HD701. Thanks for the help
In this lab, your group will experiment with programs that load theLinux system up with processor and/or filesystem activity. Be surethat you kill these processes off before logging out, as you willotherwise be quite unpopular with whoever uses the machine next, sincethese processes are designed precisely to be resource hogs. If youare running one of these programs in the foreground in a shell window(as I suggest), you can just use control-C to kill it. Otherwise youcan use the kill command. The reason to run the programs in theforeground, each in their own shell window, is that they printperiodic reports of how long it took to do the last batch ofiterations.
The two programs you will use are runner.cpp andwriter.cpp; each is linked into the web versionof this assignment. One does lots of running and the other does lotsof writing to a file. To compile them you would use the commands
There is almost zero programming to do in this lab and theexperimental procedure is relatively simple and is spelled out foryou, so the key is going to be for your group to write a good labreport that reports what you observed and provides some interpretationof those observations.
You are conducting a scientific experiment and writing a scientificreport. As such, it is important that you report not only the datayou obtain (and your interpretation of it), but also the conditionsunder which that data was obtained. This allows readers to more fullyunderstand your results, and it also provides the necessaryinformation for anyone who wants to replicate or extend yourexperiment.
You should take all your data on a single machine (except in the lastpart of the experimental procedure), since the computersin our lab differ from one another.Be sure not to use one of our newest machines (with the black systemunits), except in the last part, because they have dualprocessors (also known as dual core).You should also try to be surelittle else is running on the computer; use the "top" command andcheck that nothing is getting any appreciable percentage of the CPUtime.
Run one, two, three, and four copies of runner and observe how longthey report they are taking (as a function of how many there are).Also, in yet another shell window, run the top program and see whatpercentage of the CPU each runner process is getting (again, as afunction of how many there are).
Run two copies of runner and have a partner log into the same machineand run one additional copy of runner. (Thus you will have threecopies running, two under one user and one under another.) Again,observe their reported times and top's report of their CPUpercentages. Is Linux's scheduler giving a fair share of the CPU toeach user or to each process? Are there particular applicationsettings in which this design decision would seem particularlyappropriate or inappropriate?
How do the nicenesses affect the proportion of CPU each gets? Can youachieve a wide range of proportions using the ability to elevate theniceness of each runner by 0 to 19 points? (If you have time, you could alsocome back to this part to experiment with more than two runners.)
Run one copy of writer and observe its reported times, top's report ofits CPU percentage, and vmstat's report of the blocks written out per second.To run vmstat, in another shell window give the command
The first line of statistics is since the machine was booted, andisn't useful. However, thereafter a new line will be output every 10seconds (since you specified 10) reporting on activity in thepreceding 10 seconds. The column headed "bo" is the one showingblocks written out per second. Is the writer doing lots of actual writing todisk? (You can also look at the machine's disk light and listen fordisk sounds.)
Follow up on the preceding question by reading the man page for thefsync system call, which ensures data written to a filedescriptor is actually written to disk.Insert an appropriate call tofsync in the inner loop body of writer.cpp so that it isforced to go to disk every time it writes a character. Redo theobservations from the preceding question. You may need to reduce thenumber of iterations that are timed. Are the results quite different?
Start one runner going, and then in another shell window start one ofyour modified writers and observe theirperformance reports and the statistics from top and vmstat. How doeseach program's performance when they are run together compare withthat when run alone? Does this tell you anything about the Linuxscheduler, or about the potential utility of running multiple programsat the same time?
You could repeat at least part 1 on one of the new, black, dual-processor(dual-core) Linux machines. Scheduling is more interesting withmultiple processors. (When characterizing the machine, beware of theCPU MHz listed in /proc/cpuinfo; this will be different depending onwhether the machine is idle or active, as a result of an energy-savingfeature. The clock rate shown with the CPU model name is the maximum speed.)
You could repeat at least part 3 on a Mac OS X machine; use an oldenough one that it has a single processor. (There are two old eMacs inOHS 329, and I could also let you use my iBook.) As the textbookexplains, Mac OS X treats niceness quite differently from Linux. Tocharacterize aMac, use the Apple menu's "About this Mac" option instead of the /procfilessytem. If you test writing to disk, use the iostat command inplace of vmstat.
You could compare how Linux and Mac OS X handle multipleprocessors by repeating part 1 on a dual-processor Mac and adual-processor Linux machine. We don't have any dual-processor Macsin the MCS labs, but feel free to use your own or one from elsewhereon campus (such as the ground floor of Olin).
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