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Solve : Erase your data in Windows Vista.? |
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Answer» Warning: full format will erase your data in Windows Vista. The warning "full format will erase your data in Windows Vista" came from the instructions in Microsoft site. Majority of users don't often bother to read the volumes of information and assume that they will be able to recover their data after do a full format under Vista as USED to do with the previous versions of Windows.If this is true, then Vista full format of a hard drive would also reset the built-in bad sector remapping built into all modem drives. And nit would explain why Windows XP does not really 'fix' a drive by doing a full format. Any comments? Quote from: Geek-9pm on May 31, 2011, 07:27:17 PM If this is true, then Vista full format of a hard drive would also reset the built-in bad sector remapping built into all modem drives. No it wouldn't. the built in bad sector remapping is not something SOFTWARE accessible. http://support.microsoft.com/kb/941961 Quote Majority of users don't often bother to read the volumes of information and assume that they will be able to recover their data after do a full format under Vista as used to do with the previous versions of Windows. What? Since when did a format not erase data? Are they talking about using special tools to recover data from a formatted drive? Quote Due to the enhanced security features of Windows Vista, when a full format is run, it writes 0's to every sector of the disk. It means that the original data any more if the original data is completely rewritten by the 0's by Vista. ... Really? It zeros out the drive before it installs the ntfs format? I had no idea. I'd like to SEE a source on this - preferably from microsoft. Quote from: BC_Programmer on May 31, 2011, 08:37:48 PM
I had no idea. Why would they do this? Quote from: JJ 3000 on May 31, 2011, 08:44:18 PM Since when did a format not erase data? Are they talking about using special tools to recover data from a formatted drive?a format has never erased data. Conventionally it's only deleted the file system structures so that Operating systems don't the data. utilities can still be used to rebuild the partition table and recover data, assuming too much of the data hasn't been overwritten. Quote from: JJ 3000 on May 31, 2011, 08:49:20 PM I had no idea. Why would they do this? Several reasons. First, in order to ask why they do it differently, it might be a good idea to ask why it was done the original way to begin with. Disk I/O has always been slow. But with early file systems, if you could speed up any operation- you did. In the case of DOS, for example, deleting a file from the FAT system didn't delete the file- it renamed it. I'm serious. All it did was change the first character of the filename (this is why DOS undelete utilities require you to enter the first letter when they recover the file), and mark the clusters the file was using as free. Why? Because it was faster. A rename takes exponentially less time than actually removing the file information from disk. Now, though, computers are a lot faster and so are their hard disks. In the case of a format, they also probably found that writing zeros to every part of the disk for conventional magnetic disks was more likely to expose defects in material and workmanship in the drives earlier, rather than later (later of course being after the drive has important data stored on it). This of course has always been true, but with a older hard drive the operation could take a entire day rather then the less than an hour it takes now. Quote from: BC_Programmer on May 31, 2011, 09:02:51 PM
Okay. With XP, a full format would run CHKDSK and then format the drive. Would this not expose defects? Is writing zeros to the drive better for exposing defects? Quote from: JJ 3000 on May 31, 2011, 09:29:39 PM Okay. chkdsk doesn't read or write to every portion of the drive, which exposes defects that the hard drive will remap. This isn't a huge issue since when those sectors are written to for the first time the drive would do the remapping then, but it gives a better overall picture for S.M.A.R.T status after the format. chkdsk, with the plausible exception of running it with /R or /B switches, pretty much only works at the File-System level. Quote from: BC_Programmer on May 31, 2011, 08:37:48 PM No it wouldn't. the built in bad sector remapping is not something software accessible.Let me get back to you. Somewhere I read that on doing a write sector, not a read, would cause the drive firmware to fix a sector that had been marked bad from a prior troubled read operation. This is transparent to the OS. The drive just acts a little slow in formatting some areas. The write operation is given to a previous hidden sector renamed with the address of the current bad sector. This is not software control. It is firmware control. The exact algorithm is proprietary. Quote from: BC_Programmer on May 31, 2011, 09:32:17 PM chkdsk doesn't read or write to every portion of the drive, which exposes defects that the hard drive will remap. I see. Thank you. This article, which explains the difference between quick and full format in XP , says if you choose the quick option you can still scan the drive with chkdsk /r. I would assume that that implies the full format runs chkdsk with the /r switch, but who KNOWS with MS... http://support.microsoft.com/?kbid=302686 |
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