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Boot error msg

Refering to * sign below...i saw this message on my first boot fedora core 4.

my sda is connected to external storage and sdb is the internal scsi drive....i install the grub/mbr in sdb

Question: Based on the error message how to solve it? ... is it can be ignore?

#########Part of my linux boot##############
May  9 13:19:15 mxdb2 kernel:   Vendor: MegaRAID  Model: LD 0 RAID5  209G  Rev: 1.80
May  9 13:19:15 mxdb2 kernel:   Type:   Direct-Access                      ANSI SCSI revision: 02
May  9 13:19:15 mxdb2 kernel: SCSI device sda: 429330432 512-byte hdwr sectors (219817 MB)
May  9 13:19:15 mxdb2 kernel: sda: asking for cache data failed *
May  9 13:19:15 mxdb2 kernel: sda: assuming drive cache: write through *
May  9 13:19:15 mxdb2 kernel: SCSI device sda: 429330432 512-byte hdwr sectors (219817 MB)
May  9 13:19:15 mxdb2 kernel: sda: asking for cache data failed *
May  9 13:19:15 mxdb2 kernel: sda: assuming drive cache: write through *
May  9 13:19:15 mxdb2 kernel:  sda: sda1
May  9 13:19:15 mxdb2 kernel: Attached scsi disk sda at scsi0, channel 2, id 0, lun 0
May  9 13:19:15 mxdb2 kernel: Red Hat/Adaptec aacraid driver (1.1.2-lk2 Jun  2 2005)
May  9 13:19:15 mxdb2 kernel: ACPI: PCI Interrupt 0000:06:08.1[A] -> GSI 30 (level, low) -> IRQ 193
May  9 13:19:15 mxdb2 kernel: AAC0: kernel 2.7-1[3170]
May  9 13:19:15 mxdb2 kernel: AAC0: monitor 2.7-1[3170]
May  9 13:19:15 mxdb2 kernel: AAC0: bios 2.7-1[3170]
May  9 13:19:15 mxdb2 kernel: AAC0: serial 6e9c38d3
May  9 13:19:15 mxdb2 kernel: AAC0: 64bit support enabled.
May  9 13:19:15 mxdb2 kernel: AAC0: 64 Bit DAC enabled
##########################################
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emlily
Asked:
emlily
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1 Solution
 
cjl7Commented:
Hi,

Yes it can be ignored.

It is trying to get information about how to use write-cache. But since it can't it will use the standard of "write through" = don't use any cache.

This doesn't meen that your storage box doesn't use cache just that Linux can't "see" it at bootup.


Cheers

Jonas
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emlilyAuthor Commented:
thank you
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emlilyAuthor Commented:
but i a bit curious...during installation...i choose the manual partition....why the installation detect external storage as sda and internal drive as sdb. It suppose to detect internal as sda.
0
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cjl7Commented:
It detects it as the scsi-chain (or you bios) comes up.

If the 1:st scsi driver loaded is the one for your external storage it will become sda...

To change this you could change the order of the scsi-hostadapter in your modprobe.conf and rebuild your initrd.img...

But there is no real need for that...

//jonas
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emlilyAuthor Commented:
how about if i want to change it during linux first installation?...change at bios?
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cjl7Commented:
Not possible...

Or rather you have to change the initrd.img on the install media (cd, network or what ever..)

//jonas
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