On 3/1/23 21:01, Ranjan Maitra wrote:
Hi,
I would like to RAID two of my disks, and I was wondering if the recommendation
is to do software or hardware RAID?
Software.
Everything you need is in the mdadm command.
Regards.
--
Roberto Ragusamail at robertoragusa.it
On 2/27/23 13:44, Richard W.M. Jones wrote:
It turns out that the default open file limit (1024!) is too low. To
change this and fix the problem:
# systemctl edit httpd
This low limit can be an issue for many processes.
I don't understand why it is still so low in modern machines.
I've rai
-Original Message-
From: Ranjan Maitra
Sent: Wednesday, March 1, 2023 9:02 PM
To: Community Support for Fedora Users
Subject: software or hardware raid?
Hi,
I would like to RAID two of my disks, and I was wondering if the recommendation
is to do software or hardware RAID?
Thanks,
Ra
On Thu, Mar 2, 2023 at 2:35 AM Roberto Ragusa wrote:
>
> On 2/27/23 13:44, Richard W.M. Jones wrote:
>
> > It turns out that the default open file limit (1024!) is too low. To
> > change this and fix the problem:
> >
> ># systemctl edit httpd
> This low limit can be an issue for many processe
On Mar 2, 2023, at 03:35, Roberto Ragusa wrote:
>
> On 2/27/23 13:44, Richard W.M. Jones wrote:
>
>> It turns out that the default open file limit (1024!) is too low. To
>> change this and fix the problem:
>> # systemctl edit httpd
> This low limit can be an issue for many processes.
> I do
On 2023-03-01 12:01 pm, Ranjan Maitra wrote:
Hi,
I would like to RAID two of my disks, and I was wondering if the
recommendation is to do software or hardware RAID?
Thanks,
Ranjan
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On Wed, Mar 1, 2023 at 4:02 PM Ranjan Maitra wrote:
> Hi,
>
> I would like to RAID two of my disks, and I was wondering if the
> recommendation is to do software or hardware RAID?
>
Software RAID works very well on modern hardware. You do want to make sure
a power
outage can't cause a shutdown
Thanks to everybody. I recall discussion from several years ago on the benefits
of software over hardware RAID. I had completely forgotten about UPS for this
new machine. Btw, what happens if power goes out (and I do not have UPS)?
Btw, I still stick to ext4, largely because of inertia (and beca
On Thu, Mar 2, 2023 at 2:25 PM Ranjan Maitra wrote:
> Thanks to everybody. I recall discussion from several years ago on the
> benefits of software over hardware RAID. I had completely forgotten about
> UPS for this new machine. Btw, what happens if power goes out (and I do not
> have UPS)?
>
If
if you suddenly lose power there is a fair chance that the last few
blocks of data had not made it to disk yet.
For the most part this only only a big issue with oracle db and/or
mysql and/or stuff with critical transactions that cannot be lost and
that need a consistent state when they come back
Once upon a time, Ranjan Maitra said:
> Thanks to everybody. I recall discussion from several years ago on the
> benefits of software over hardware RAID. I had completely forgotten about UPS
> for this new machine. Btw, what happens if power goes out (and I do not have
> UPS)?
Linux software R
Hello,
I have 3 NVMe PCIe M.2 SSD part number CT4000P3PSSD8 on my card. However, the
Fedora installer only sees one of these three SSDs. I tried looking at them
using nvme list and only see one (and two separate 256 GB SSDs). I looked into
the case, and all three 4 TB drives are there, with lig
Thanks, Chris!
On Thu Mar02'23 02:49:49PM, Chris Adams wrote:
> From: Chris Adams
> Date: Thu, 2 Mar 2023 14:49:49 -0600
> To: users@lists.fedoraproject.org
> Reply-To: Community support for Fedora users
> Subject: Re: software or hardware raid?
>
> Once upon a time, Ranjan Maitra said:
> > Th
Once upon a time, Ranjan Maitra said:
> Thanks, this will be a fairly high uptime machine (not allowed to call it a
> server here, because that is central IT's role to have and administer:-),
> running lots of jobs at least a large part of the time, but the RAID will be
> on the /. It is more
On Thu, Mar 2, 2023 at 3:50 PM Ranjan Maitra wrote:
>
> Hello,
>
> I have 3 NVMe PCIe M.2 SSD part number CT4000P3PSSD8 on my card. However, the
> Fedora installer only sees one of these three SSDs. I tried looking at them
> using nvme list and only see one (and two separate 256 GB SSDs). I look
On Thu, Mar 2, 2023 at 4:43 PM Richard Shaw wrote:
> On Thu, Mar 2, 2023 at 2:25 PM Ranjan Maitra wrote:
>
>> Thanks to everybody. I recall discussion from several years ago on the
>> benefits of software over hardware RAID. I had completely forgotten about
>> UPS for this new machine. Btw, what
On Thu, Mar 2, 2023 at 4:49 PM Roger Heflin wrote:
> if you suddenly lose power there is a fair chance that the last few
> blocks of data had not made it to disk yet.
>
Some data can be replaced, but there are also real-time data flows
where data are lost forever when the system does down. I re
Once upon a time, George N. White III said:
> Some data can be replaced, but there are also real-time data flows
> where data are lost forever when the system does down. I recall a
> lost-of-data incident where the system was on UPS+ generator but
> IT hadn't received the replacement for a failed
On Wed, Mar 1, 2023 at 3:02 PM Ranjan Maitra wrote:
>
> I would like to RAID two of my disks, and I was wondering if the
> recommendation is to do software or hardware RAID?
Also see "A Journal for MD/RAID5", https://lwn.net/Articles/665299/
and "ext3 and RAID: silent data killers?",
https://lwn
On Thu, 2023-03-02 at 17:09 -0600, Chris Adams wrote:
> Lots of the time, UPSes and generators are not actively monitored and
> tested. An untested backup system is not a backup system, it's just
> another point of failure! I have seen failures of big UPSes,
> generators, transfer switches... you
On Thu, Mar 2, 2023 at 10:42 PM Tim via users
wrote:
>
> On Thu, 2023-03-02 at 17:09 -0600, Chris Adams wrote:
> > Lots of the time, UPSes and generators are not actively monitored and
> > tested. An untested backup system is not a backup system, it's just
> > another point of failure! I have se
Tim:
>> I have a UPS sitting next to me, right now, in pieces, which (half)
>> died in a most peculiar manner:
>>
>> A burning smell was eventually traced to it. There's no visible
>> signs of burning, and no schematic available for the model, that I
>> can find. A rather acrid smell, not one I'm
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