Topic: Data Error (Cyclic Redundancy Check)

[Boy.Pickup]

Good evening co Espiya sino na po naka encounter ng gantong error before. BTW I know this error but fixing this using chkdsk is a very long process last night 24 hrs ko syang iniwan pero konti lang improvement only 2 error lang ang progress nya. My External Hard drive is a 500gig Seagate and i have a file in there almost 5 yrs na    anyone na narecover ung file nyo using other third party program can someone po n may alam pano ayusin.

[bodieph]

crc error means there are bad sectors on the hard drive and that a portion of the file is on the bad sector. chkdsk will try to move the data from the bad sector to a good sector but it will take time especially if the file in question is an archive (rar, iso, etc)

since bad sectors are physical errors on the drive, they cannot be fixed. software claiming to fix these simply overwrite the system in the hard drive so that these sectors will be detected as good again but this does not mean the bad sector is fixed. its still there, you might be able to use the sector again but too risky if you ask me since again they are physical errors

[d_sinner78]

Having the kind of slow progress that TS described over 24 hours is rather unusual even for a 500GB hard drive. Encrypted ba ung disk mo? If not, your hard drive may be crashing soon. May nadidinig ka bang ticking sound?

I suggest na baklasin mo na yan at ikabit as external or slave sa ibang PC/laptop para ma-copy out mo ung importanteng files.

[Boy.Pickup]

I search over the internet and most of them is same with my situation they're stuck at some point of process specifically on the 2nd checking which is verification of indexes. also according to technet microsoft 70gb of volume is taking hrs of chkdsk or even days it depends on the volume of the hard drive. @sinner external po yung HDD ko. @bodieph yes sir actually yun ung gusto ko ma achieve kaso no luck ako sa chkdsk sobrang tagal nya kaya im asking you guys if you have alternative solution maybe a third party program that is try and tested nyo na. Thank You Guys for your inputs.

[gr4ntur1smo]

usually may trick yan.. yung freezer effect.. first wrap mo ung HDD on a leak proof case.. or wrap mo ung tipong hindi mababasa.. then lagay mo sa freezer overnight then the next day kabit mo sa desktop as slave then restore mo ung files.

http://www.thetechmentor.com/posts/put-your-hard-drive-in-the-freezer-to-recover-data/

i forgot ung isang ginamit kong software but ill make halungkat of my files    then balikan kita..

[Boy.Pickup]

Hmmm... Actually OK pa naman yung mga ibang files yung iba lang na files ang may mga error na gusto ko ma ayos if ever. guys ano kaya specific explanation what it is happen kasi hindi naman nabagsak yung external ko it happens the error after i transfer my folder of songs in my backup external then yun na ang start. First Music Folder lang and then later on after a days i discover na may mga folder na error din and i notice that the folder that OK before naging error na din... parang nadadamay at first ang hinala ko baka virus so i scan it using my but no virus detected. tska ang error nmn is data error (CRC) kaya virus is not the cause.

[Boy.Pickup]

Re-Ups ko lang po tong thread na to. 

[d_sinner78]

Hmm... 'Di muna ako sumagot kasi 10+ years na akong hindi involved sa hardware stuff, so baka hindi na updated ung alam ko. Pero since wala ibang sumasagot, let's try.

CRC is Cyclic Redundancy Check. Originally, mathematical algorithm sya to ensure na walang error ung data na tina-transmit/data na na-receive. Nung early days ng mga computer kahit pag-copy ng data from one disk to another e prone sa error so yan gamit nila para ma-ensure na na-copy ng tama ung data/file.

So pag-in-access mo ung file mo sa hard disk, technically, tina-transfer ung data from your hard disk papunta sa processor mo. Ina-apply nya uli ung CRC para malaman kung 'error-free' ung nabasa nyang file. Nung unang panahon, problematic din yan kahit from disk to CPU lang. Pero ngayon, malaki na improvements sa technology, so usually pag may na-report na CRC error sa disk files, ang cause e bad sectors o physical defects sa disk mo. So far, parang wala ako maalalang CRC error na (proven) caused by virus. Convenient lang kasing palusot na sabihing na-virus ung PC mo. Pero ang alam ko dyan, disk issue talaga.

Hindi kailangang mabagsak ng hard disk mo para magkaroon ng bad sectors. Pwedeng damaged na sya from the start, pwedeng nadikit sa malupit na magnet, pwedeng malupit na static or pwede ring matanda na talaga ung hard disk mo at kailangan na palitan, atbp. That's why sa malalaking companies, lagi silang may backups ng hard disk, kasi at anytime, pwede talaga mag-fail yan.

Tinanong kita kung may nadidinig ka na ticking sound kasi usually sign un na nag-crash ung hard disk. Once nag-crash yan, progressively masisira na ung buong disk, which sounds like what's happening to your disk. Sa loob kasi ng hard disk maraming parang diskette (kung inabot mo pa) na patong-patong, lahat un magnetically charged.

Tapos may tinatawag na disk head, yun ung magnetic metal stick na nagbabasa ng hard disk mo. Pareho yang magnetic, at pag sinabing nag-crash, ung disk head e nag-'crash' or dumikit sa disk.

Masamang mag-crash yan kasi mabilis umikot ung mga disk sa loob. Kung ich-check mo ung mga hard disk ngayon, yan ung stat na 5400 or 7200 rpm. Kakayod ung disk head sa disk mo at progressively na syang masisira.

Hindi ko sure kung nagw-work pa rin yan freezer technique sa ngayon kasi lumiit na ung mga components sa loob ng hard disk. Siguro use it as a last resort na lang. Hindi yan nakaka-ayos ng CRC errors, pero instead, it's supposed to prevent further damage para ma-copy out mo ung files mo. Ung hard disk head na nabanggit ko sa taas, since metal sya, nagsh-shrink yan pag malamig. So kung hard disk crash ung problem, pag nags-shrink ung head, magkaka-space na ulit between ng hard disk at disk head. Hindi yan permanenteng solusyon kasi eventually iinit uli hard disk mo at didikit/kakayod na sya ulit.

Baka meron dyang may updated info, curious din ako kung ano na nagbago.

[Boy.Pickup]

Thanks d_sinner for the info as of now nakatengga lang ung external HD ko kasi na try ko na lahat ng solution na alam ko pero nothing happen. i tried data recovery software para lang maretrieve ko ung mga files na unaccessible. i tried 2 data recovery software una kala ko na recover ko na kasi naretrieve na from HD haha kaso nung binuksan ko na ung mga files na narecover from hard disk corrupted naman din also with the pic half lang nakikitang image hahaha so failed pa din. pag may time try ko dalhin sa data recovery service center baka lang mag himala. 

[gr4ntur1smo]

ayun.. sir try mo eto.. HDD regenerator ni Dmitriy Primochenko... may inayos na ko na HDD ganyan tyagaan lang sa paghintay matapos nya ung HDD...