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Everything posted by powdarrmonkey
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Good source acknowledgement
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The messenger service is not included in Windows Vista/7. It's replaced by the command 'msg', but the two are incompatible.
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Without RAID: - making it easier to move volume groups between machines, because their place in /dev stops mattering - extending volumes across disks when space is scarce - starting with small volumes because you don't fancy forecasting growth, and extending later - mixing disk sizes into single volumes - splitting, moving, extending and partitioning volumes without taking the machine offline This doesn't strictly require LVM, you could do that with good old partitioning (unless that's a requirement of your hypervisor). With RAID: - extending volumes you've been conservative with - combining onboard and add-in RAID cards (there's no point having software RAID on top of two hardware RAID arrays, after all) and so on.
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Here, this might help visualise it better: http://4.bp.blogspot.com/_rKe_nbWInhE/Swsese1VFFI/AAAAAAAADko/KgF1iW9AFm4/s1600/lvm.jpg shamelessly cribbed from Linux Document: LVM - Logical Volume Manager - AIX 5.3 Plain LVM mirroring can provide better performance than plain software RAID mirroring, but it is (probably) less resilient, since it acts on volumes not whole disks. No. LVM - all data on all PVs, extra PV for the logs. RAID-5: all data spread across all disks, parity information treated the same way. That depends on the kernel modules included on the rescue disk - any sane disk should include them, like it should also include md modules, but don't make assumptions. Full LVM guide: LVM HOWTO
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LVM is also for joining small partitions together into one large volume (hint: the acronym is "logical volume management"), a process called extending. If you're going to use software RAID anyway, you can forget mdadm altogether and use LVM mirroring for redundancy (which can be faster, see http://www.joshbryan.com/blog/2008/01/02/lvm2-mirrors-vs-md-raid-1/) or LVM extending for striping: LVM Mirroring - How to mirror a logical volume - Lvm, Mirroring, Physical Volume, Lvm Howto, Volume Group HOWEVER this requires additional disks, because the parity log is not striped into the data, it's separate. The safest, but slower, arrangement is LVM on top of md software raid. Of course, you'll also want to print out and archive 6.3.*Recovering from LVM Mirror Failure Yes: partition the new disk, add the physical volumes to your group and convert the logical volume OR use mdadm to create true software RAID with only your two disks.
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Not much help with the camping, it's been years since I tried it - but we'll be just outside Newquay very soon after that weekend, if you're still down there... The cider farm's well worth a visit
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Brand Identity as source code - hacking fashion
powdarrmonkey replied to beeswax's topic in General Chat
Maybe I didn't understand the implications of the article, but it reads like someone has taken the most popular, revolutionary and cool words from our world and tried to write an article about fashion design with them. They failed, too. -
He is a fail, not the PC. The case is earthed for a reason. The PSU is electrically isolated from the mains and provides only a maximum of 12V to the processor, which is not a hazardous level. The cables near the front of the case are between 3 and 5V - same as you'd get if you stuck a paperclip in the front of a USB port. The whole arrangement is earthed through the case's connection with the PSU. A PAT tests for a number of things, amongst others: - case or structural damage that could expose high voltage live parts (the faceplate is not an integral part of the structure, nor does it expose high voltage live parts) - earth bond from the exposed metal of the chassis - fuse, polarity and electrical continuity - insulation and isolation of live parts from the chassis It does not test against small children stick their grubby fingers inside a deliberately manufactured gap in the plastic fascia. You astound me. This is blatantly a money-maker - he's in for a killing if he can fail 150 devices *and* manage to get the work to come back and test them again in a few weeks. Ask him to show you in his copy of the Code of Practice which section it fails under. Bet he doesn't have one.
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EduDate - Connecting Lonely EduStaff the World Over (bit of a laugh, but seriously it'd be interesting to see who does sign up and what happens after that... )
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The tester is an idiot, tell him so (and, while you're at it, ask why they are a fail. I like a good laugh).
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The execute permission on directories is equivalent to the "list folder contents" permission in Windows, so you'll be wanting that one for your httpd user. You also won't be able to control the permission set on files that uploaded through Wordpress on the fly, you'll have to go over them later.
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I used to stay at an old hunting lodge guest house on the fringe of the New Forest for a few days or a week at a time, and busy myself pottering about in the forest photographing and reading. Haven't done it in a while now though, probably should some time...
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For the sake of clarity, these are prefixes not tags.
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A VPN is overkill for one user, remote access like Logmein would be more friendly I think.
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Your office keys are needed for your job, but if you left them in a pub you wouldn't expect the school to roll over and replace them just like that...
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Things you'd never hear on a film about computers
powdarrmonkey replied to Hightower's topic in General Chat
Spock: "Cap'n, it seems HP have bought out our warp drive manufacturers and released new drivers. Trouble is, they're 400MiB and we only have a microwave link back to base..." -
If you send it to technical support staff in July, it will go straight in the bin. Same as the beginning or end of any term. edit: and you don't need to send it, you would like to send it.
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SQL Server Express for ICT students
powdarrmonkey replied to sidewinder's topic in Educational Software
Set it up in a single instance on a server and create a database for each student on it. -
If your DNS infrastructure relies on clients using servers in the right order, it's already broken. DNS is round-robin redundant for very good reasons. Well-designed DNS means any server can answer any query, either by authoritatively, forward lookup, or reference. Are you in the habit of posting offensive comments??
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Things you'd never hear on a film about computers
powdarrmonkey replied to Hightower's topic in General Chat
This post requires attribution, see xkcd - A Webcomic - License -
Check Browser Compatibility, Cross Platform Browser Test - Browsershots
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Connect ethernet device (printer) to wireless network
powdarrmonkey replied to nicklec's topic in Wireless Networks
Pretty sure you haven't explained why this suggestion won't work (or don't understand what it is). -
Connect ethernet device (printer) to wireless network
powdarrmonkey replied to nicklec's topic in Wireless Networks
Buy a wireless print server with USB on the end.
