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  • How to recover from a drive failure in a RAID 5 configuration?

    - by Philip Fourie
    This morning a drive failed on our database server. The drive array (3 disks) is setup in a RAID 5 configuration. While we wait for a drive replacement we are preparing for a recovery strategy. Users are continuing to work on the system, albeit very slowly (don't know why??). How does one install the new drive - will the data for this drive automatically be rebuilt from the parity or is there another process we should follow? Edit: This is a hardware RAID controller. (Thanks for the answers so far, appreciated)

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  • Horrible performing RAID

    - by Philip
    I have a small GlusterFS Cluster with two storage servers providing a replicated volume. Each server has 2 SAS disks for the OS and logs and 22 SATA disks for the actual data striped together as a RAID10 using MegaRAID SAS 9280-4i4e with this configuration: http://pastebin.com/2xj4401J Connected to this cluster are a few other servers with the native client running nginx to serve files stored on it in the order of 3-10MB. Right now a storage server has a outgoing bandwith of 300Mbit/s and the busy rate of the raid array is at 30-40%. There are also strange side-effects: Sometimes the io-latency skyrockets and there is no access possible on the raid for 10 seconds. The file system used is xfs and it has been tuned to match the raid stripe size. Does anyone have an idea what could be the reason for such a bad performing array? 22 Disks in a RAID10 should deliver way more throughput.

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  • postfix header_checks using regexp proper setup

    - by Philip Rhee
    I just can't seem to figure out why header_checks are not being evaluated. I'm on Ubuntu 12.04, postfix 2.7, dovecote, spamassasin, clamav, amavis. I add following line to /etc/postfix/main.cf : header_checks = regexp:/etc/postfix/header_checks And here is header_checks : /From: .*/ REPLACE From: [email protected] To test out regexp : #postmap -q "From: <werwe>" regexp:/etc/postfix/header_checks which evaluates correctly and give me return output of : REPLACE From: [email protected] However, when I try to send email from commandline or from php webpage, postfix will not replace the From header. I'm stumped.

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  • Can I disable comments by default on my YouTube videos?

    - by Philip Durbin
    Comments are unfortunately always automatically enabled when I upload a video to YouTube either via their website or iPhoto, but more often that not I later manually disable comments for each uploaded video by following the steps from the "comments on my videos" section of YouTube Help. I would much rather have comments automatically disabled, that is to say, disabled by default, for all of my uploaded videos. Is this possible? I couldn't find a setting for it.

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  • How can I make Firefox remember my session while still clearing browsing history on close?

    - by Philip
    I am aware, thanks to this thread ( https://support.mozilla.com/en-US/forum/1/381229 ), that Firefox doesn't save sessions when browsing history is cleared at close, as effectively the open tabs are themselves cleared from the history before the session is saved. But I would like Firefox to behave differently. Is there any way to change Firefox's behavior so it will clear my browsing history when it closes, but remember only that a certain list of tabs were open, and then restore those tabs when it opens (not even necessarily with those tabs' histories)? I'm running FF 3.5.6 on Mac OS X 10.5. Thanks.

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  • Cannot install PC Tools firewall

    - by Philip
    I am unable to install PC Tools firewall..It is fine up until after rebooting then the PcTools icon in the system tray hangs and indicates it is "initializing." I have waited 5 minutes and no change. I have tried multiple times.The Vista firewall was turned off prior to attempting to the attempted installation. Help!Thank You

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  • How can I customize the notification from Google Notifier and Google+Growl?

    - by Philip
    As best I can tell, Google+Growl just makes the Google Notifier growl the notification instead of displaying its own. The GrowlMail plugin lets you configure what info is displayed upon receipt of a new message. Is there a way to configure what is displayed by the Google Notifier a la GrowlMail--in other words, to choose that I just want to see e.g. that there is a new message and the time, but not the sender or body, etc. etc....? Thanks!

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  • WINDOWS 7 SOFTWARE PROBLEM

    - by PHILIP KIRK
    I am running Windows 7 and have adjusted something which has caused all of my shortcuts and program icons to show the same program namely Adobe Reader and when I click on any of the icon or shortcuts they only open Adobe reader, I have reinstalled Windows 7 But this has made no change, I posted this question yesterday but apparently with not enough information I hope this is better and someone can help.

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  • How can I force Firefox to select the tab to the right on tab close?

    - by Philip
    I'm using TMP 0.3.8.2 and a host of other extensions on FF 3.6.3 on OSX 10.6. I've tried disabling all other extensions that might interfere with tab settings but it's hard to keep track of everything because I have literally 60 (about 30 are disabled though) that are on and off in various configurations. I'm wondering if there's a way to FORCE Firefox to select the tab to the right on closing a tab, in such a way that it overrides any other setting anywhere else. I realize the prospects for this are dim. Thanks.

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  • Get rid of drop down cc-bcc-reply-to field when composing in Mail?

    - by Philip
    Is there any way to get rid of the drop down cc bcc reply-to etc. field menu in the compose new message window in Mail in Mac OS X Snow Leopard? The offending menu is the one immediately to the left of the Subject field when composing a new message, and it interrupts me as I try to tab from To: to Subject: to the message body. If you know of any way to be rid of it, I'd be very grateful. Thanks!

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  • VLAN for WiFi traffic separation (new to VLANing)

    - by Philip
    I run a school network with switches in different departments. All is routed through to a central switch to access the servers. I would like to install WiFi access points in the different departments and have this routed through the firewall (an Untangle box that can captive-portal the traffic, to provide authentication) before it gets onto the LAN or to the Internet. I know that the ports that the APs connect to on the relevant switches need to be set to a different VLAN. My question is how do I configure these ports. Which are tagged? Which are untagged? I obviously don't want to interrupt normal network traffic. Am I correct in saying: The majority of the ports should be UNTAGGED VLAN 1? Those that have WiFi APs attached should be UNTAGGED VLAN 2 (only) The uplinks to the central switch should be TAGGED VLAN 1 and TAGGED VLAN 2 The central switch's incoming ports from the outlying switches should also be TAGGED VLAN 1 and TAGGED VLAN 2 There will be two links to the firewall (each on its own NIC), one UNTAGGED VLAN 1 (for normal internet access traffic) and one UNTAGGED VLAN 2 (for captive portal authentication). This does mean that all wireless traffic will be routed over a single NIC which will also up the workload for the firewall. At this stage, I'm not concerned about that load.

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  • fstab mount after network initialization

    - by Philip
    I'm automatically mounting a NFS with fstab. Sometimes the mount fails because the hostname of the NFS mount cannot be resolved (getaddrinfo failed). I'm assuming that this happens because the network initialization is slower than the mounts. Is there any way to initialize the network before mounting any devices? I'm already using _netdev as a mount option but this does not help. This is my current fstab file: # <file system> <mount point> <type> <options> <dump> <pass> /dev/md2 / ext3 errors=remount-ro 0 1 /dev/md1 /boot ext3 errors=remount-ro 0 1 /dev/sda3 swap swap defaults 0 0 /dev/sdb3 swap swap defaults 0 0 connect.mygluster.net:/data /var/gluster/data glusterfs ro,_netdev 0

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  • iPhone VPN to iTunes Home Sharing

    - by Philip Crumpton
    my goal is to set up a VPN on a Windows machine that contains my iTunes library then connect to that VPN with my iPhone and be able to utilize Home Sharing remotely. I have read that this can easily be set up if the iTunes library is on a Mac (Network Beacon and YazSoft ShareTool are two products I quickly found). I can't find anyone who has had success on a Windows machine, though. In my thinking, there are two options (aside from buying a Mac): 1.) Existing utility that takes care of this for me (like the Mac-only options listed above) and is compatible with iPhone (Hamachi is NOT compatible with iPhone VPN) 2.) Manually configure a VPN to allow Bonjour multicast (can't find any information on this) FYI my router is a Linksys WRT54GL running Tomato 1.28

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  • Using a AWS EC2 Server to host a busy website and I need to set up a loadbalancing

    - by Philip Isaacs
    My company has one EC2 server running on AWS with a MYSQL-DB and Apache on the same instance. This one instance hosts a website built on PHP Zend Framework. The site runs like crap when it starts to get busy with a lot of traffic so I'm looking for some advice on how to set up something that can handle the load better. My first question is should I move the mysql DB on to a separate EC2 instance or perhaps use AWS's RDS service which looks like a nice option. I'm sort of new to some of this but I'm guessing I'll need at least two EC2 instances for serving the website from and some sort of load balancing mechanism to distribute traffic. But maybe not, I'm not sure. Also what are some best practices for how to replicate the data so that they stay in sync on both instances? Okay I know these are a lot of questions. But I don't know where to start so any advice will help.

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  • Blocking of certain file downloads

    - by Philip Fourie
    I have a problem where I cannot completely download a certain file from a server. The file is 1.9MB in size but only 68% is downloaded and then it hangs. I tried and these cases, which failed: Downloaded the file with HTTP Downloaded the file with FTP Moved the file to different FTP and web servers behind the ISA firewall Tried with IIS 6.0 & IIS 7.0 Multiple download clients. Which included FireFox, FileZilla (on Windows) and wget (on Linux) This worked: Downloading other files from the same location on the server. Both bigger and smaller and in size than the original. FTP and HTTP worked. Earlier version of this file (.DLL) works. It is as if the content of this file has an influence on this file being served. Network architecture: Client Machine - Internet (ISP) - ISA Server - IIS 7.0 The only constants are the ISP, Cisco router and the ISA server. Is it possible that something is rejecting the download because of the contents of the file? I am hoping ISA is the culprit... I am not a ISA expert is there somewhere I can look to establish if it is indeed ISA causing this? Update: Splitting the file into two parts with a hex editor results in one half of the file being served correctly and the other part not. Zipping the file results in the file being downloaded successfully. However this is not an option for this particular scenario. Renaming the file and its extension also doesn't work. Update 2009/10/22: It does NOT seems to be ISA that is causing this problem. We connected a laptop (running IIS) on an available public IP and still the file download to 68% before it hanged. The two remaining components are the ISP and the Cisco 800 series router. Anyone knows about an issue on the router perhaps?

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  • nginx static file buffer

    - by Philip
    I have a nfs which several frontend-servers are connected to for making the files stored on the nfs available for http downloads. It looks like I have problems with the way apache is serving the files, there seems to be a very small buffer or no buffer at all which results in a lot disk seeks. I did some testing with loading the whole requested file into memory at once and serve it to the client from memory. With this technique I need less disk seeks for a download stream. Since I don't want to implement this by myself for production use I thought that I could maybe use nginx for that because the documentation says that it uses buffers for static file serving. Is it possible to increase the buffer size to a few mb, if so which config parameter do I have to change for this? Has anyone experience with large buffers for static file serving? Is there a better way to reduce disk seeks?

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  • Ubuntu 10.04 on virtualbox gives error: Target filesystem doesn't have /sbin/init \ No init found. Try passing init= bootarg

    - by Philip
    I'm a linux newbie and the only reason I have it installed is so I can stop having Windows incompatibility issues with Ruby on Rails. Having said that, it sure has been nice, and much faster, and I don't think I'll be doing any Winrails stuff anytime soon. So I created a virtualmachine using virtualbox and have had ubuntu on it for the last 3 weeks. Recently ubuntu asked if it could update a few things, I clicked 'ok'. Now it won't boot and I get this error: *mount: mounting /dev on /root/dev failed: No such file or directory mount: mounting /sys on /root/sys failed: No such file or directory ... Target filesystem doesn't have /sbin/init. No init found. Try passing init= bootarg BusyBox v1.13.3... (initramfs) _ * So I cruised the forums and there are a variety of solutions, but they all have to do with booting from the live cd. (which I assume is the ISO image I used to install ubuntu in the first place). But when I boot from that CD, it just hangs on the ubuntu screen, and the little dots keep cycling white to red, but it hung there for an hour so I think it was stuck. Not sure what I can do; can I do anything from the busybox shell (or whatever that is) to fix things? The thing is, it took about 10 hours to get everything the way I needed with all the gems and whatnot. And I didn't really write down what I tweaked, and I'm middle aged, so all that information has leaked out by now and I don't want to do it again. I'd really like to repair my existing install. One question you might have is, is there something wrong with the ISO? I don't think so, because I made a new virtual machine and used that same iso file to install a fresh ubuntu. Any help much appreciated. Phil

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  • Can I disable OS X Lion Autosave and Versions?

    - by Philip
    OK I'm going there: I want to turn off a new feature in OS X that's so infuriating I could swear it was designed by Microsoft, namely, Autosave / Versions. I just don't want it. I have a workflow that involves my trigger finger on cmd-S, I use my own VCS when necessary, I save as compulsively and I open applications like TextEdit and Preview as temporary notepads without wanting any changes saved automatically and without a stupid unlock dialog that then records my changes when I only want to see the changes and not record them. So: please tell me how I can turn off Versions without rolling back to 10.6, and you will be my new personal hero. Thanks! PS: Just asking how to disable, not for a discussion of the pros and cons of the features.

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  • How can I make the Firefox Password Manager more intelligent?

    - by Philip
    I have two major gripes about the FF password manager: If I restore a session with multiple tabs with sites with saved passwords, the master password prompt pops up once for each of them, even if I correctly enter the password the first time. Sometimes I want Firefox not to use my saved passwords at all (e.g. because I want to let someone else use it without getting access to my accounts), but hitting cancel results in erratic behavior--sometimes the box just pops up again and again, or sometimes it stops and behaves as I wish (continuing to browse w/o my passwords) until it encounters another site that wants my password. Thus even when hitting cancel does leave me free to browse passwordless, it doesn't get Firefox to leave me alone for the whole session. Thus: do you know of any tweak or add-on that could (1) make Firefox smart enough to get my master password once and then leave me alone, and/or (2) add an option (checkbox-style, toggle button, etc.) to browse "for now" (until I toggle the option) or even "for this session" (until I restart) without using any of my saved passwords? I'm running Firefox 3.5.6 on Mac OS X 10.5; thanks.

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  • iTunes Home Sharing with VPN

    - by Philip Crumpton
    I'm trying to set up a VPN on a Windows machine that contains my iTunes library, then connect my iPhone ot it, wirelessly, using Home Sharing (remotly). I have read that this can easily be set up if the iTunes library is on a Mac (Network Beacon and YazSoft ShareTool are two products I found). I can't find anyone who has had success on a Windows machine, though. In my thinking, there are a few options to getting this done. Find a utility that takes care of this for me (like the Mac-only options listed above) and is compatible with iPhone (Hamachi is NOT compatible with iPhone VPN). Manually configure a VPN to allow Bonjour multicast (I'm not sure what this really is...) Emulate a Mac on my Windows PC. FYI my router is a Linksys WRT54GL running Tomato 1.28 Note question is related to this

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  • Configuring EC2 Instance

    - by Philip Isaacs
    Forgive me if this seems like a dumb question, but I'm wondering how do I increase the processing power (cpu, memory) of an instance I already have running. Right now I have a web server running on a m1.small type instance and it's performing poorly at peak times, is it possible to increase the amount of memory on the instance somehow, or do I need to create a new EC2 install. What are my options. Please advise.

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