关于SATA RAID问题

sata5753

现在的主板上大多带有所谓的"SATA硬件RAID",在DOS和windows下可以正常使用。
不过在Quick Linux（及其他版本的Linux)安装时，所设置的RAID0/1模式会仍然显示出单独的两个硬盘，读取不到RAID的array。
这是因为这些板载raid只是软件raid，而不是真正意义上的硬件raid。它在启动时在常规内存中插入一个RAID BIOS驱动，截获硬盘读写中断将读写动作转换成RAID动作，在DOS下可以正常使用。在安装使用XP时，则必须按F6用软盘安装相应的驱动，否则XP无法操作硬盘，一定蓝屏。
Linux与XP类似，是完全的32位(或64位模式)操作系统，只使用自带的STAT驱动，因此会出现读出了两个硬盘。
大多数主板上自带的SATA RAID都是这样的情况。
对于这样的主板，只能设置软件RAID，Quick Linux光盘安装程序可以设置SATA硬盘的软件RAID。软件RAID的性能也同样很好，经测试可以达到单硬盘的两倍速度。
或者单独购买SATA RAID卡。用SATA RAID卡则不会出现这样的问题。
要注意的是，使用板载SATA RAID，由于它完全不起作用，还是不要把它设置成RAID0/1模式，不要加ARRAY。Linux安装程序可能出现硬盘签名错误等信息，会以两个硬盘方式来操作，在分区时清除掉硬盘上原有信息，造成无法意料的后果。
1. I have an Intel ICH5/6/7 SATA RAID. Why doesn't Linux support my hardware RAID?
A. It's not hardware RAID. It is software RAID, provided by the BIOS on the card.
2. I have a VIA SATA RAID. Why doesn't Linux support my hardware RAID?
A. It's not hardware RAID. It is software RAID, provided by the BIOS on the card.
3. I have a Silicon Image SATA RAID card. Why doesn't Linux support my hardware RAID?
A. It's not hardware RAID. It is software RAID, provided by the BIOS on the card.
4. I have an Adaptec 1210SA SATA RAID card. Why doesn't Linux support my hardware RAID?
A. It's not hardware RAID. It is software RAID, provided by the BIOS on the card.
5. I have a Promise TX2 SATA RAID card. Why doesn't Linux support my hardware RAID?
A. It's not hardware RAID. It is software RAID, provided by the BIOS on the card.
6. I have a Promise TX4 SATA RAID card. Why doesn't Linux support my hardware RAID?
A. TX4 has "RAID5 accelerator" features, but is not full and true hardware RAID. TX4 can offload RAID5 XOR calculations, but typically the host CPU is much faster. Therefore, Linux does not use the RAID5 features of this card.
7. I have a Promise SX4 SATA RAID card. Why doesn't Linux support my hardware RAID?
A. SX4 has extensive "RAID accelerator" features. While not true hardware RAID, this card has several features which do indeed accelerate RAID support. Unfortunately, Linux does not support the SX4's special RAID accelerator features at this time.
For certain configurations, Promise's Linux driver will perform better than the native Linux SATA driver.


本文来自ChinaUnix博客，如果查看原文请点：http://blog.chinaunix.net/u2/69856/showart_712598.html