Re: Linux Software RAID is really RAID?

["Johny Mail list" <maillist.johny@gmail.com>]

2007/7/3, Tejun Heo <htejun@gmail.com>:
> Brad Campbell wrote:
> > Johny Mail list wrote:
> >> Hello list,
> >> I have a little question about software RAID on Linux.
> >> I have installed Software Raid on all my SC1425 servers DELL by
> >> believing that the md raid was a strong driver.
> >> And recently i make some test on a server and try to view if the RAID
> >> hard drive power failure work fine, so i power up my server and after
> >> booting and the prompt appear I disconnected the power cable of my
> >> SATA hard drive. Normaly the MD should eleminate the failure hard
> >> drive of the logical drive it build, and the server continue to work
> >> fine like nothing happen. Oddly the server stop to respond and i get
> >> this messages :
> >> ata4.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen
> >> ata4.00: cmd e7/00:00:00:00:00/00:00:00:00:00/a0 tag 0 cdb 0x0 data 0
> >>              res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
> >> ata4: port is slow to respond, please be patient (Status 0xd0)
> >> ata4: port failed to respond (30sec, Status 0xd0)
> >> ata4: soft resetting port
> >>
> >> After that my system is frozen.
>
> How hard is it frozen?  Can you blink the Numlock LED?
>
> --
> tejun
>
Hello tejun
It froze just when the "ata4: port failed to respond (30sec, Status
0xd0)" is printed and yes my Numblock LED not respond when i press the
numlock key.