Jeremy Chadwick wrote:
The RAID card itself may have a BBU, so during loss of power any cached
data *on the card* will be attempt to be flushed to disk... except the
PC (including hard disks -- unless they're powered from some other
source) is already down/offline by this point. And let's not
On Wed, Oct 29, 2008 at 07:49:00PM +, Matthew Seaman wrote:
Given that you don't have a BBU, what is the status of write caching
on the individual hard drives? You'll have to use 3dm2 or the CLI
equivalent to investigate this, as the RAID controller tends to hide
that level of
On Thu, Oct 30, 2008 at 06:12:07PM -0500, Rich Winkel wrote:
On Wed, Oct 29, 2008 at 07:49:00PM +, Matthew Seaman wrote:
Given that you don't have a BBU, what is the status of write caching
on the individual hard drives? You'll have to use 3dm2 or the CLI
equivalent to investigate
On Thu, Oct 30, 2008 at 04:38:49PM -0700, Jeremy Chadwick wrote:
...
In this scenario, write caching on the disks is usually done by the
controller itself (through a BIOS option), and not by FreeBSD.
This should have read: ... usually enabled/disabled by the controller
itself. :-) Sorry if
On Thu, Oct 30, 2008 at 04:38:49PM -0700, Jeremy Chadwick wrote:
On Thu, Oct 30, 2008 at 06:12:07PM -0500, Rich Winkel wrote:
Doesn't hw.ata.wc affect only card-level caching?
hw.ata.wc causes the ata(4) subsystem to disable write caching on all
disks attached to the subsystem. It does not
On Thu, Oct 30, 2008 at 08:41:59PM -0500, Rich Winkel wrote:
On Thu, Oct 30, 2008 at 04:38:49PM -0700, Jeremy Chadwick wrote:
On Thu, Oct 30, 2008 at 06:12:07PM -0500, Rich Winkel wrote:
Doesn't hw.ata.wc affect only card-level caching?
hw.ata.wc causes the ata(4) subsystem to disable
On Thu, Oct 30, 2008 at 07:33:47PM -0700, Jeremy Chadwick wrote:
One of the main functions of softupdates is to order disk updates in such
a way that the fs organizational integrity is maintained at all times.
And we've recently found that this is simply not the case. The benefits
of SU
On Thu, Oct 30, 2008 at 10:05:43PM -0500, Rich Winkel wrote:
On Thu, Oct 30, 2008 at 07:33:47PM -0700, Jeremy Chadwick wrote:
One of the main functions of softupdates is to order disk updates in such
a way that the fs organizational integrity is maintained at all times.
And we've
Hi,
I'm new to FreeBSD (and UNIX in general), and I have read through the
handbook and various websites to gain some insight on this question, but
haven't found a concrete solution yet, and I'm hoping you guys can help.
I'm wanting to build a FreeBSD 7.0 based file server for a small/medium
Rich Fairbanks wrote:
Now, this is how I set up the array. I installed the card, popped in the
drives. The card bios found the drives and allowed me to setup in RAID 5.
Then, FreeBSD booted and found the disk as da0. I want the entire array to
be one big chunk of space. In other words, I don't
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Matthew Seaman wrote:
Rich Fairbanks wrote:
Now, this is how I set up the array. I installed the card, popped in the
drives. The card bios found the drives and allowed me to setup in RAID 5.
Then, FreeBSD booted and found the disk as da0. I want
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