introduced in HP-UX. It's a major boon in systems
with multiple disks and long lifetimes, less so in workstations -
although I find it useful enough even in them, as disks tend to
need replacing if only because they get too small, and it's nice
to be able to do that without much downtime.)
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tend to use raid whenever I can, that is, in almost every
machine with enough room for disks, and raid1, raid6 or raid10,
sometimes raid0 when speed is crucial but data is expendable
(cheap to regenerate); raid5 I try to avoid.
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to mess things up), reboot, realize you've
messed up, go to step (3). :-)
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the mail and waiting for reply or something.)
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$( (sleep 5; echo quit; ps |awk '/telnet/{print kill $1}' |sh) | telnet
192.168.0.20 25 2- )
in
*'
220 '*) echo Success ;;
*)echo Failed ;;
esac
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telnetting to it.
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tools.
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Failed ;;
esac
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).
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known to be too impatient.
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it that way make sense?
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of a partially lost lv is
rather painful.
And of course raid/mirroring helps - with software raid as
well as with lvm mirroring you can do it even with disks
of different sizes.
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/
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to partition
them into even more pieces and raid them separately.)
If you want to stick to one raid1 array it is of course also
possible: mdadm --grow and pvresize are what you need.
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for doing (2)?
I'm using rsnapshot, and given what you told of your setup,
I think you'd be happy with it, too.
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of the file content - not fun.
With a binary file it would've been all but impossible.
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What I have seen is news headings like
Windows Home Server Bug Could Lead To Data Loss and
Shared Folders Problem While Removing Physically Failed Hard
Drive in Windows Home Server.
If someone has actual experience about dealing with lost
disk in WHS, please tell us.
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of course is not the same thing: ease of use is the whole selling
point of Windows Home Server.
I guess the closest Linux equivalent would be Openfiler (www.openfiler.com),
but I don't know of any separate disk management GUI that could be used
in Debian.
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/boot.
If you are making separate /boot, you might as well
put / under LVM (which is what I'd do - and indeed
what I have done with just about every machine I have
installed since I've forgotten when).
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increase complexity and require learning some
new tricks, but they're well worth the trouble if you
manage any system more complex than a simple workstation,
IMHO.
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(or rather, encrypt
mdadm devices used as lvm physical volumes and put / in there),
and then there's no choice.
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in a critical place in the disk.
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and increased complexity, if you are using LVM anyway.
Capacity can be dynamically added with pairs of disks.
Yes. I'd prefer that if speed isn't critical.
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There are situations where the advantages of lvm are not important
and its complexity may be a reason to avoid it. I think they're rare,
but my view may be biased by the fact I've used lvm for so long that
I no longer remember it ever being difficult. :-)
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doubles, taking /lib to 340MB or thereabouts.
I do't see it at all impossible that the 500MB I have for / there now
will get too small before the machine is retired.
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to go with the former.
There wasn't much difference in speed as I recall, but md allowed
making bootable raid1 and it seemed better supported in Linux.
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difference
whether physical volumes are disks or disk pairs.
Anybody want to claim being a newbie and having an opinion here?
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system presently on the RAID5?
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at hand, but I think rebuilding 3x500GB RAID5 would
take longer than 2x1TB RAID1.
So 2x1TB as RAID1 is safer than 3x500GB as RAID5.
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compromise between cost, reliability, speed and simplicity
under a wide range of requirements.
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sizes so that you can later combine them
in various ways.
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processor installed in debian?
cat /proc/cpuinfo
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ds_cpl cid
is it ok? for 64 bit
Yes. The lm in the flags list means long mode = x86-64.
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Skype calls.
Whether it's any better than Skype, well, depends.
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(don't know about this particular one).
StarTech 2 Port PCI-Express eSATA/SATA (1 Int + 1 Ext) Card Model PEXESATA2I
http://www.newegg.com/Product/Product.aspx?Item=N82E16815158095
(uses (jmicron) AHCI)
No experience with this one.
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if you are buying a new machine and plan to have over 4GB
of RAM, a 64-bit CPU and OS would be preferable.
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space at the end of the partition,
and pvresize will claim it.
At least that's how it works with normal disks, I don't
know if your hardware RAID does something strange.
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(including things I've made
by forgetting something) may result in loss of data.
Fresh backup before starting is recommended.
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another LVM partition and add it to the
existing volume group (pvcreate, vgextend).
If there is some reason that won't do what you want, I'm
curious to hear what it is.
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to use full path for ifconfig,
i.e. /sbin/ifconfig, as /sbin may not be in $PATH.
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on Gnu date (but that's what Debian uses,
so it's appropriate here): date --date week gives the date
one week from now, and if the month is different, today
is the last Monday.
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gives up before getting the reply.
Leo, try europe.pool.ntp.org instead, and if it fails, try again
with 0.europe.pool.ntp.org, 1.europe.pool.ntp.org c up to 3.
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by the fact that filenames
were short (most 12 characters with the directory name),
but the speedup over -exec is still rather impressive.
If anyone can come up with a scenario where -exec
is significantly faster than xargs, I'd be interested.
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to remove everything in the directory, the find version
could be speeded significantly by using xargs, i.e.,
find . -type f -print0 | xargs -0 rm
This is especially useful if you want to remove files selecticely
instead of everything at once.
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pvmove - with
hotswap disks you could even replace the root disk without booting.
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,
your system will be significantly more vulnerable than if you do.
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-stage cryptdisk
startup sequence like I do, or in some other way that opens encrypted
LVM volumes only at the late cryptdisk startup script?
If it's just me I guess I'm better off messing with rc.local,
otherwise I'll consider making a bug report/enhancement request.
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of tweaking it's now running happily
as a DNS server and mail relay. The biggest memory hog was rsyslogd,
but it's memory footprint shrunk from about 28MB down to 4MB
simply by adding 'ulimit -s 128' to /etc/default/rsyslog.
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latency timer of device :01:00.0 to 64
Any suggestions would be appreciated.
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