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Old 07-22-2008, 01:00 AM
"pat decampos"
 
Default (initramfs) Assuming drive cache: write through

hi all,

i've been using ubuntu happily for a year now and have never seen this issue before. google leaves me empty handed.

i plugged in an external HD formatted in NTFS and started my machine. ubuntu came up with the error seen in the subject. if i unplug the hard drive, it doesn't find the partition, however, windows can see it fine (dual booting, i installed via wubi). ubuntu side it says something about busybox, and it has a list of commands if i type HELP.


has anyone encountered this issue before? what did you do to resolve it?

-- pat

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Old 07-22-2008, 02:16 AM
Derek Broughton
 
Default (initramfs) Assuming drive cache: write through

pat decampos wrote:

> hi all,
>
> i've been using ubuntu happily for a year now and have never seen this
> issue before. google leaves me empty handed.
>
> i plugged in an external HD formatted in NTFS and started my machine.
> ubuntu came up with the error seen in the subject. if i unplug the hard
> drive, it doesn't find the partition, however, windows can see it fine
> (dual booting, i installed via wubi). ubuntu side it says something about
> busybox, and it has a list of commands if i type HELP.
>
> has anyone encountered this issue before? what did you do to resolve it?

Why not boot without it, and _then_ plug it in? In my experience, booting
with USB drives connected, but without a boot loader on them, will fail if
USB is selected to boot first in the BIOS.
--
derek


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Old 07-22-2008, 11:26 AM
"pat decampos"
 
Default (initramfs) Assuming drive cache: write through

i've tried that, but it doesn't recognize my boot partition. i have to edit to grub boot options to boot from hd(2,1) to hd(1,1), and then I can boot into ubuntu.

very strange, and i don't understand why it's happened.


On Mon, Jul 21, 2008 at 10:16 PM, Derek Broughton <news@pointerstop.ca> wrote:

pat decampos wrote:



> hi all,

>

> i've been using ubuntu happily for a year now and have never seen this

> issue before. google leaves me empty handed.

>

> i plugged in an external HD formatted in NTFS and started my machine.

> ubuntu came up with the error seen in the subject. if i unplug the hard

> drive, it doesn't find the partition, however, windows can see it fine

> (dual booting, i installed via wubi). ubuntu side it says something about

> busybox, and it has a list of commands if i type HELP.

>

> has anyone encountered this issue before? what did you do to resolve it?



Why not boot without it, and _then_ plug it in? *In my experience, booting

with USB drives connected, but without a boot loader on them, will fail if

USB is selected to boot first in the BIOS.

--

derek





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Old 07-22-2008, 12:22 PM
"Michael Varre"
 
Default (initramfs) Assuming drive cache: write through

Pardon me for jumping in on this thread with my own question, however i have similari messages in all my 6.06 and 8.04 LTS servers.* The only thing is that all my ubuntu systems, approximately 20, run on VMware ESX 3.5 as virtual hosts.* I assumed this message was simply due to the fact that I dont have physical drives attached to the ubuntu host, thus i have no drive cache that ubuntu is aware of....at least from the hosts perspective.

*
Am I right on here?* And if i am, Derek, then I would assume that it is just that your drive is not getting its cache recognized properly?


*
On Tue, Jul 22, 2008 at 7:26 AM, pat decampos <decampos@gmail.com> wrote:


i've tried that, but it doesn't recognize my boot partition. i have to edit to grub boot options to boot from hd(2,1) to hd(1,1), and then I can boot into ubuntu.

very strange, and i don't understand why it's happened.





On Mon, Jul 21, 2008 at 10:16 PM, Derek Broughton <news@pointerstop.ca> wrote:




pat decampos wrote:

> hi all,
>
> i've been using ubuntu happily for a year now and have never seen this
> issue before. google leaves me empty handed.
>
> i plugged in an external HD formatted in NTFS and started my machine.

> ubuntu came up with the error seen in the subject. if i unplug the hard
> drive, it doesn't find the partition, however, windows can see it fine
> (dual booting, i installed via wubi). ubuntu side it says something about

> busybox, and it has a list of commands if i type HELP.
>
> has anyone encountered this issue before? what did you do to resolve it?

Why not boot without it, and _then_ plug it in? *In my experience, booting

with USB drives connected, but without a boot loader on them, will fail if
USB is selected to boot first in the BIOS.
--
derek


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--




mv
315.952.5753
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Old 07-22-2008, 12:24 PM
"Michael Varre"
 
Default (initramfs) Assuming drive cache: write through

Sorry i should have attached my actual log entries......

[460305.341617] sd 2:0:0:0: [sda] 62914560 512-byte hardware sectors (32212 MB)
[460305.341763] sd 2:0:0:0: [sda] Test WP failed, assume Write Enabled
[460305.341862] sd 2:0:0:0: [sda] Cache data unavailable

[460305.341887] sd 2:0:0:0: [sda] Assuming drive cache: write through
[460305.342034] sd 2:0:0:0: [sda] 62914560 512-byte hardware sectors (32212 MB)
[460305.342103] sd 2:0:0:0: [sda] Test WP failed, assume Write Enabled

[460305.342127] sd 2:0:0:0: [sda] Cache data unavailable
[460305.342130] sd 2:0:0:0: [sda] Assuming drive cache: write through
[460305.342233]* sda: sda1 sda2 < sda5 >
[460305.352244] sd 2:0:0:0: [sda] Attached SCSI disk

[460305.352390] sd 2:0:1:0: [sdb] 2097152 512-byte hardware sectors (1074 MB)
[460305.352462] sd 2:0:1:0: [sdb] Test WP failed, assume Write Enabled
[460305.352487] sd 2:0:1:0: [sdb] Cache data unavailable
[460305.352490] sd 2:0:1:0: [sdb] Assuming drive cache: write through

[460305.352615] sd 2:0:1:0: [sdb] 2097152 512-byte hardware sectors (1074 MB)
[460305.352682] sd 2:0:1:0: [sdb] Test WP failed, assume Write Enabled
[460305.352706] sd 2:0:1:0: [sdb] Cache data unavailable
[460305.352709] sd 2:0:1:0: [sdb] Assuming drive cache: write through

[460305.352752]* sdb: sdb1
[460305.353099] sd 2:0:1:0: [sdb] Attached SCSI disk


On Tue, Jul 22, 2008 at 8:22 AM, Michael Varre <mvarre@gmail.com> wrote:



Pardon me for jumping in on this thread with my own question, however i have similari messages in all my 6.06 and 8.04 LTS servers.* The only thing is that all my ubuntu systems, approximately 20, run on VMware ESX 3.5 as virtual hosts.* I assumed this message was simply due to the fact that I dont have physical drives attached to the ubuntu host, thus i have no drive cache that ubuntu is aware of....at least from the hosts perspective.

*
Am I right on here?* And if i am, Derek, then I would assume that it is just that your drive is not getting its cache recognized properly?


*
*
*
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Old 07-22-2008, 12:28 PM
"xerces8"
 
Default (initramfs) Assuming drive cache: write through

Hi!

Yes, "Assuming drive cache: write through" is not an error.
The original poster should give more details.

Regards,
David

-----Original Message-----
From: "Michael Varre" <mvarre@gmail.com>
To: "Ubuntu user technical support, not for general discussions" <ubuntu-users@lists.ubuntu.com>
Date: Tue, 22 Jul 2008 08:24:07 -0400
Subject: Re: (initramfs) Assuming drive cache: write through

> Sorry i should have attached my actual log entries......
>
> [460305.341617] sd 2:0:0:0: [sda] 62914560 512-byte hardware sectors (32212
> MB)
> [460305.341763] sd 2:0:0:0: [sda] Test WP failed, assume Write Enabled
> [460305.341862] sd 2:0:0:0: [sda] Cache data unavailable
> [460305.341887] sd 2:0:0:0: [sda] Assuming drive cache: write through
> [460305.342034] sd 2:0:0:0: [sda] 62914560 512-byte hardware sectors (32212
> MB)
> [460305.342103] sd 2:0:0:0: [sda] Test WP failed, assume Write Enabled
> [460305.342127] sd 2:0:0:0: [sda] Cache data unavailable
> [460305.342130] sd 2:0:0:0: [sda] Assuming drive cache: write through
> [460305.342233] sda: sda1 sda2 < sda5 >
> [460305.352244] sd 2:0:0:0: [sda] Attached SCSI disk
> [460305.352390] sd 2:0:1:0: [sdb] 2097152 512-byte hardware sectors (1074
> MB)
> [460305.352462] sd 2:0:1:0: [sdb] Test WP failed, assume Write Enabled
> [460305.352487] sd 2:0:1:0: [sdb] Cache data unavailable
> [460305.352490] sd 2:0:1:0: [sdb] Assuming drive cache: write through
> [460305.352615] sd 2:0:1:0: [sdb] 2097152 512-byte hardware sectors (1074
> MB)
> [460305.352682] sd 2:0:1:0: [sdb] Test WP failed, assume Write Enabled
> [460305.352706] sd 2:0:1:0: [sdb] Cache data unavailable
> [460305.352709] sd 2:0:1:0: [sdb] Assuming drive cache: write through
> [460305.352752] sdb: sdb1
> [460305.353099] sd 2:0:1:0: [sdb] Attached SCSI disk
>
> On Tue, Jul 22, 2008 at 8:22 AM, Michael Varre <mvarre@gmail.com> wrote:
>
> > Pardon me for jumping in on this thread with my own question, however i
> > have similari messages in all my 6.06 and 8.04 LTS servers. The only thing
> > is that all my ubuntu systems, approximately 20, run on VMware ESX 3.5 as
> > virtual hosts. I assumed this message was simply due to the fact that I
> > dont have physical drives attached to the ubuntu host, thus i have no drive
> > cache that ubuntu is aware of....at least from the hosts perspective.
> >
> > Am I right on here? And if i am, Derek, then I would assume that it is
> > just that your drive is not getting its cache recognized properly?
> >
> >



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Old 07-22-2008, 02:27 PM
Derek Broughton
 
Default (initramfs) Assuming drive cache: write through

pat decampos wrote:

> i've tried that, but it doesn't recognize my boot partition. i have to
> edit to grub boot options to boot from hd(2,1) to hd(1,1), and then I can
> boot into ubuntu.

It sounds as if you set up grub while the USB drive was plugged in.
However, it should be simply a matter of changing all hd2 to hd1
in /boot/grub/menu.lst, and then it should boot without the USB drive.

Now it should be visible if you plug it in after boot.

--
derek


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Old 07-22-2008, 02:29 PM
Derek Broughton
 
Default (initramfs) Assuming drive cache: write through

Michael Varre wrote:

> Pardon me for jumping in on this thread with my own question, however i
> have
> similari messages in all my 6.06 and 8.04 LTS servers. The only thing is
> that all my ubuntu systems, approximately 20, run on VMware ESX 3.5 as
> virtual hosts. I assumed this message was simply due to the fact that I
> dont have physical drives attached to the ubuntu host, thus i have no
> drive cache that ubuntu is aware of....at least from the hosts
> perspective.
>
> Am I right on here? And if i am, Derek, then I would assume that it is
> just that your drive is not getting its cache recognized properly?

It's not my problem, it's Pat's.

Actually, I don't think the "assuming drive cache" message is any kind of
error. That's just normal. The error was in getting dumped to BusyBox,
which is never a good thing :-(
--
derek


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