影响大容量硬盘正常使用的操作系统

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  硬盘越来越便宜了,尤其是大容量的硬盘,其性价比越来越突出,据笔者观察,目前250GB的硬盘单GB容量已经不足3元。面对比白菜还要便宜的硬盘,你是否心动了呢?也许答案是否定的,只要是由于受到主板芯片组的困绕,导致他们不敢轻意的去购买更大容量的硬盘来升级。其实,目前限制大容量硬盘使用的因素除了BIOS和主板芯片组两方面,还有一重要因素,那就是操作系统.

  操作系统对于大容量硬盘的支持

  只有支持48bit LBA模式(IDE接口规范,Logical Block Addressing,LBA是现今大多数高容量硬盘存取数据的方式,它用48位来表示硬盘上的每一个位置)的操作系统才能提供对于大容量硬盘的支持。早期的Windows 95/Windows 98/98 SE/Me都不支持48bit LBA模式,因此无法提供对137GB以上容量的支持,Windows 98/98 SE操作系统的磁盘管理只能管理64GB的硬盘,超过这个容量的硬盘就会无法识别。它的分区软件Fdisk同样也不能正确识别出64GB以上的硬盘,因此如果利用它来分区的话容易导致识别错误,分区表混乱等情况。如果想要使用windows 98/SE操作系统的话,只能采用特别的方法对大硬盘分区,然后安装操作系统。在此情况下,如果BIOS支持48bit LBA模式,则系统能够识别137GB硬盘容量,但是在访问时容易出错。因此建议安装双系统,对于64GB以后的分区采用NTFS格式。

  windows 2000/XP操作系统虽然支持48bit LBA模式,能够正确识别超过137GB的硬盘,但是默认情况下并没有启用对48bit LBA模式的支持,需要在安装操作系统后再安装补丁程序,通常情况下Windows 2000+SP4、windows xp+SP1均能保证硬盘的正确识别与使用。此 外,即使windows 2000打过SP1的补丁也要检查系统下Atapi.sys文件的版本,因为只有5.1.2600.1135版本才能完全支持48 位 LBA,对于windows xp 来说Atapi.sys文件应为5.1.2600.1152版本, 否则会在访问大于137GB的数据时有可能出现溢出的Bug,造成破坏。最常见的情况是,在写入大量数据(120GB以上)后就丢失了分区,或拷贝数据过程中失去响应,重启后报告该分区没有格式化等。

  由于这两个操作系统提供了对137GB以上硬盘的支持,因此我们可以利用它们的光盘来为大硬盘分区。方法是利用安装光盘启动电脑后将硬盘分出一个区安装windows 2000/XP操作系统,然后进入系统后先打补丁。之后利用系统自带的磁盘管理工具对余下的未分区部分进行分区。

  操作系统对于分区的要求

  windows 98/98 SE/Me由于磁盘管理方面的限制,对硬盘容量的限制仅限于64GB,因此在给硬盘分区时,无论是多个分区还是单一分区其硬盘容量总和不应超过64GB。对于超过64GB容量以外的分区可改用NTFS格式来解决。

  微软技术文档中还提到了Windows 2000对于分区的要求。虽然Windows 2000能够向下兼容识别FAT32格式,并且FAT32格式支持2000T容量的硬盘,但是Windows 2000却无法提供对超过30GB容量的FAT32格式分区的支持。只要分区容量超过30GB,并且为FAT32格式,无论这个分区是C盘还是其他分区,Windows 2000均无法识别多余容量。对于NTFS格式的分区识别,windows 2000则不存在此问题。这一点也是在分区时需要留心的!!

  需要提醒大家的是,对于采用windows 2000/XP光盘作为分区工具为137GB以上硬盘分区的,当操作系统崩溃之后重新安装系统时千万不能在安装补丁之前访问盘符排在最后面的分区,否则极易造成数据丢失或分区表错误。

  最后希望朋友们能愉快地使用好自己的大容量硬盘。

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