>> del to, kad tingiu gilintis kiek atomu telpa i keliu mikronu siuksle >> ir is kokios materijos ta galva, kad nuo jos atsipirdolina >> tie 3,14*10^4 atomu dydzio siuksliu gabalai.. > > Tai, jei tingi, tai pakaks matyt ir wikipedinio straipsnelio: > https://en.wikipedia.org/wiki/Hard_disk_drive_failure Straipsnis word'e 5psl .. figuruoja ir 199* metai.. abejoju kad rasiu mikroskopais iliustruota minimaliai suvaryta hdd, atbruzintas pagal pilna programa disko foto nedomina.. Ctrl+F .. identifikavo viena pastraipa.. nu tiek netingiu: The most notorious cause of HDD failure is a head crash, <..> usually just hovering above the surface, touches a platter, or scratches the magnetic data-storage surface <..> A head crash usually incurs severe data loss, and data recovery attempts may cause further damage if not done by a specialist with proper equipment. bukai interpretuojant - galvos crash'as paprastai (usually) ne pora nesidauginanciu bad'u . HDD platters are coated with an extremely thin layer of non-electrostatic lubricant, so that the read-and-write head will simply glance off the surface of the platter should a collision occur. However, this head hovers mere nanometers from the platter's surface which makes a collision an acknowledged risk. kazkaip neina suprasti apie sita vazelina.. tipo vietom gali pati galva brukstelt.. 7200rpm=120rps=1rp8,3ms .. ten visokie Shock 75Gs 300G.. sorry tingiu apskaiciuot kaip ikalt 4 sektoriukams ir nebutinai geometriskai panasioje platterio vietoj ar identiskoj kito platerio vietoj.. Another cause of failure is a faulty air filter. The air filters on today's HDDs equalize the atmospheric pressure and moisture between the HDD enclosure and its outside environment. If the filter fails to capture a dust particle, the particle can land on the platter, causing a head crash if the head happens to sweep over it. vel subdalele uzvarte galva.. man aktualu kaip mizerna zala padaryt.. jei apsiverte ar nutruko galva - taip jai ir reikia.. After an HDD crash, particles from the damaged platter and head media can cause one or more bad sectors. cia griauna ka interpretuoju.. bet yra "can" :) .. bet siaip - "can cause one bad sector" tipo mano pradini teigini griaunantis teiginys.. taciau jis nera ziauriai tiksliai argumentuotas/nenucincyjamas.. These, in addition to platter damage, will quickly render a HDD useless. kitaip pakreipkim, jei nenutiko "will quickly render a HDD useless" vadinasi nenutiko ankstesni "causes"?.. cia ne "can", cia jau "will" .. nors auksciau paminetos priezastys beveik garantuoja ragus hardui. klausimas ar visada pora bad'u reikia tas katastrofines tipines kajuk bedas? papildoma eilute is ten, kur pasiuntei: Modes of failure: Bad sectors: some magnetic sectors may become faulty without rendering the whole drive unusable. This may be a limited occurrence or a sign of imminent failure. "may" ... ir dar .. may be "sign of imminent failure" .. bet "may be a limited occurrence".. > zjbs, viska skaityt?.. tingiu (ok, as pats kaltas).. > > Tingi, bet perskaitei, net ir cituoji iš aibės skirtingų vietų. Nemeluok, ne taip jau ir tingėjai... :-) deja ne viska.. pagal raktinius zodzius ties 3.5.* ir conclusions.. skaitymas su xaltura.. Kitka nutryniau: http://www.howtogeek.com/173463/bad-sectors-explained-why-hard-drives-get-bad-sectors-and-what-you-can-do-about-it/ Types of Bad Sectors A logical — or soft — bad sector is a cluster of storage on the hard drive that appears to not be working properly. The operating system may have tried to read data on the hard drive from this sector and found that the error-correcting code (ECC) didn’t match the contents of the sector, which suggests that something is wrong. These may be marked as bad sectors, but can be repaired by overwriting the drive with zeros — or, in the old days, performing a low-level format. Windows’ Disk Check tool can also repair such bad sectors. Causes of Soft Bad Sectors Soft bad sectors are caused by software issues. For example, if your computer suddenly shuts off due to a power outage or a pulled power cable, it’s possible that the hard drive may have shut off in the middle of writing to a sector. In some cases, it’s possible for sectors on the hard drive to contain data that doesn’t match their error-correction code — this would be marked as a bad sector. Viruses and other malware that messes with your computer could also cause such system issues and cause soft bad sectors to develop. Siaip klausimas.. tarkim "logical — or soft — bad sector" .. paleidi MHDD su remap ON.. ka jis darys?.. pirma identifikuos bad'a.. toliau fiksins.. rodys repair'a ar remap'a.. o is tikruju ka padare?.. software'iskai isnulino, ar hardwariskai liepe repam'inti? PS. per daug klientu turejau, kurie "negirdi" kad HDD reiketu keisti.. taip pat senoji praktika - va praskenavau HDD, rado tris badus, windai kraunas, duok $ iki kito karto.. kitas kartais po metu, nes virusai suede.. SMART negrazus, praleidziu MHDD, bad'u daugiau nerado.. ok, gal atspejau, kad vienas kitas bad'as tai dar nebutinai garantija hdd kajuko greitojo.. PSS. kartais SMART'as rodo keli pending, o MHDD ju neranda.. taip ir kabo ilgai nuobodziai..