All of your data are written separately into four harddisks,so,if you want to recover them,you must conbine them at first.As nothing is updated after March 15th in one of the disks,you can only recover the dataupdated before March 15th.
we take 4 harddisks as a disk array ,and one of them is chosen to be redundant disk,then the others will be written into datas. if one of them breaks, we can use the rest three to work out the data and to recover them. if two of them break,we are not able to recover the data any more.Now,your system prompts thattwo of your harddisks are broken,but we find that the fourth one is not actually.This mistake results from the system failureof the function to discover it after March 15th. We can help to find the fourth one back,after which we work out the data in the first disk,taking advantage of the second ,the third and the fourth disk.In this way,we recover your data at last.However,since the fourth disk hasn‘t been working since March 15,we can only recover the data before March 15th that it keeps.
哎呦,終于完了,累死了.你英語(yǔ)很棒啊，以后我再有翻譯就找你了。 還有一句： 之前已經(jīng)說(shuō)過(guò)，每個(gè)數(shù)據(jù)是被分成四份寫(xiě)到四塊硬盤(pán)上的。那么，如果3月15日之前的某些數(shù)據(jù)在這之后被修改過(guò)，而這些數(shù)據(jù)在第四塊硬盤(pán)上的部分是沒(méi)修改以前的，重組時(shí)就會(huì)產(chǎn)生錯(cuò)誤，所以沒(méi)法恢復(fù)。因此，能恢復(fù)多少3月15日前的數(shù)據(jù)，取決于你們?cè)谶@之后修改過(guò)的數(shù)據(jù)的多少。強(qiáng)烈要求加分??！稍等我馬上翻譯。。強(qiáng)烈要求加分?。∩缘任荫R上翻譯。。We'v said that every datum is written into each of the four harddisks,so if any data updated before March 15th are modified later,but the same data in the fourth disk haven't been modified,errors will arise ,thus we are not able to recover them.Because of this,how many data updated before March 15th we can recover lies in how many of them have been modified.