Lai gan lielākajai daļai no mums nav nepieciešams iepakot mūsu ārējos cietos diskus ar mums visur, kur mēs ejam, ir daži cilvēki, kuriem, iespējams, būs nepieciešams tos pārvadāt tur, kur viņi ceļo. Ņemot to vērā, ievērojamas temperatūras atšķirības negatīvi ietekmē šos cietos diskus. Šodienas SuperUser Q & A ziņai ir atbildes uz satraucošo lasītāja jautājumiem.
Šodienas jautājumu un atbilžu sesija mums priecājas par SuperUser - Stack Exchange dalību, kas ir kopienas vadīta Q & A tīmekļa vietņu grupa.
Foto pieklājīgi no Gillware datu atgūšanas (YouTube).
Jautājums
SuperUser lasītājs misha256 vēlas uzzināt, vai ārējie USB cietie diski ir pakļauti iekšējai kondensācijai.
Apparently, you can kill a USB hard-drive by moving it from a cold temperature environment to a warm one and powering it up (the killer being internal condensation).
How real is the risk? What kind of temperatures are we talking about? I do not want to waste time acclimatizing my hard-drive every day if it is not necessary. Are there technologies or solutions available to mitigate the risk?
Surprisingly, I have found nothing useful on the Internet that provides satisfactory answers to my questions.
Vai ārējam USB cietajam diskam ir risks no iekšējas kondensācijas?
Atbilde
SuperUser atbalstītājs harrimc ir atbilde mums:
Condensation is a real danger for hard-drives. You can see in a real-life YouTube demonstration by a data-recovery specialist what a hard-drive looks like when taken out of a freezer and briefly turned on (it is full of scratches):
Such scratches could possibly damage the hard-drive to a point where even a data-recovery specialist would be unable to recover the data. A Control Data (later Seagate) factory packaging manual for hard-drives says:
If you have just received or removed this unit from a climate with temperatures at or below 50°F (10°C), do not open this container until the following conditions are met, otherwise condensation could occur and damage to the device and/or media may result. Place this package in the operating environment for the time duration according to the following temperature chart.
It seems that dangerously low temperatures start when a computer is brought in from temperatures below 50°F (10°C) into a room-temperature area and it may need several hours for acclimatization. This long time is explained by the fact that in a mechanical hard-drive, the head is supported by airflow entering through special air-intakes. These intakes are heavily filtered against dust, but not against humidity. They are also small enough that it slows down the evaporation process of internal humidity.
You could possibly minimize the acclimatization time by wrapping the disk in watertight plastic while it is acclimatizing in order to reduce the humidity that would enter via the air-intakes. You should allow for some drying-off time after unwrapping the disk (for the humidity in the air already contained inside the disk).
This is not the only danger, as explained by data-recovery specialist ReWave Recovery:
A hard-drive is at risk for sudden temperature changes including overheating and condensation.
A sudden change in temperature that causes condensation inside the hard-drive can cause the material on the platter to evaporate which causes the read/write heads to stick to the platter and stop it from rotating.
Overheating can also be an issue. Overheating can cause the platters to expand which makes the read/write heads travel farther to read the data. The expansion of platters can cause friction which can lead to a head crash.
Vai kaut ko pievienot paskaidrojumam? Skatieties komentāros. Vēlaties lasīt citas atbildes no citiem tehnoloģiju savvy Stack Exchange lietotājiem? Šeit skatiet pilnu diskusiju pavedienu.
Mac ir reputācija, jo ir grūti uzlabot vai labot, bet tas ne vienmēr ir taisnība. Cietais disks (vai SSD) ir viens komponents, kuru jūs bieži varat aizstāt sevi, jo īpaši vecākiem Mac lietotājiem. Apskatīsim, kā uzzināt, vai jūs varat aizstāt savu.
Neatkarīgi no tā, vai mūsu datortehnoloģija ir pavisam jauna vai nedaudz vecāka, nekad nekas neliekas piesardzīgi, lai izvairītos no tā kaitējuma. Ņemot to vērā, vai magnēti var bojāt cieto disku vai noslaukīt to? Šodienas SuperUser Q & A ziņai ir atbilde uz satraucošā lasītāja jautājumu.
Ja jums ir cietais disks, kas formatēts ar failu sistēmas FAT32, iespējams, esat atradis, ka nevarat kopēt lielus failus uz šo disku. Tātad, kā jūs to novērst un failu sistēmu pārvērst NTFS? Lūk, kā.
