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  • Today's Guide to Linux Virtualization

    <b>Linux.com:</b> "There's no question about whether to deploy virtualization; the real question is what virtualization solutions to look at and what workloads to virtualize. We'll help cut through the complexity and help set the options straight."

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  • Should I use my own public API on my site (via JS)?

    - by newboyhun
    First of all, this question is far more different other 'public api questions' like this: Should a website use its own public API?, second, sorry for my English. You can find the question summarized at the bottom of this question. What I want to achieve is a big website with a public api, so who like programming (like me) and likes my website, can replicate my website's data with a much better approach (of course with some restrictions). Almost everything could be used by the public API. Because of this, I was thinking about making the whole website AJAX driven. There would be parts of the API which would be limited only to my website (domain), like login, registering. There would be only an INTERFACE on the client side, which would use the public and private API to make this interface working. The website would be ONLY CLIENT SIDE, well, I mean, the website would only use AJAX to use the api. How do I imagine this? The website would be like a mobile application, the application only sending a request to a webserver, which returns a json, the application parses it, and uses it to advance in the application. (e.g.: login) My thoughts: Pros: The whole website is built up by javascript, this means I don't need to transfer the html to the client, saving bandwidth. (I hope so) Anyone can use up the data of my website to make their own cool things. (Is this a con or pro? O_O) The public API is always in use, so I can see if there are any error. Cons: Without Javascript the website is unusable. The bad guys easily can load the server with requesting too much data (like Request Per Second 10000), but this can be countered via limiting this with some PHP code and logging. Probably much more work So the question in some words is: Should I build my website around my own api? Is it good to work only on the client side? Is this good for a big website? (e.x.: facebook, yeah facebook is a different story, but could it run with an 'architecture' like this?)

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  • How do I set a different wallpaper for each workspace in Xubuntu 13.04?

    - by Sebastian
    This might seem like a common question that have been already solved. Well, I checked many tutorials, question and googled a lot but almost everything failed after all. The main problem is that I do not have gconf-editor and even if I install it, I don't have an "/apps/nautilus/preferences/show_desktop" option to uncheck to finish whole quite known compiz tweak. Does anybody managed this issue on Xubuntu 13.04? May I ask how? Thank you in advance.

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  • SEO Training Series - The Benefit of Link Relevancy

    We get asked all the time about link building and how we can make the most of it, but the question that causes the most problems is 'relevancy'. In this first of a few articles on this very subject, we tackle the question head on and discover just what relevancy is anyway.

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  • "Collection Wrapper" pattern - is this common?

    - by Prog
    A different question of mine had to do with encapsulating member data structures inside classes. In order to understand this question better please read that question and look at the approach discussed. One of the guys who answered that question said that the approach is good, but if I understood him correctly - he said that there should be a class existing just for the purpose of wrapping the collection, instead of an ordinary class offering a number of public methods just to access the member collection. For example, instead of this: class SomeClass{ // downright exposing the concrete collection. Things[] someCollection; // other stuff omitted Thing[] getCollection(){return someCollection;} } Or this: class SomeClass{ // encapsulating the collection, but inflating the class' public interface. Thing[] someCollection; // class functionality omitted. public Thing getThing(int index){ return someCollection[index]; } public int getSize(){ return someCollection.length; } public void setThing(int index, Thing thing){ someCollection[index] = thing; } public void removeThing(int index){ someCollection[index] = null; } } We'll have this: // encapsulating the collection - in a different class, dedicated to this. class SomeClass{ CollectionWrapper someCollection; CollectionWrapper getCollection(){return someCollection;} } class CollectionWrapper{ Thing[] someCollection; public Thing getThing(int index){ return someCollection[index]; } public int getSize(){ return someCollection.length; } public void setThing(int index, Thing thing){ someCollection[index] = thing; } public void removeThing(int index){ someCollection[index] = null; } } This way, the inner data structure in SomeClass can change without affecting client code, and without forcing SomeClass to offer a lot of public methods just to access the inner collection. CollectionWrapper does this instead. E.g. if the collection changes from an array to a List, the internal implementation of CollectionWrapper changes, but client code stays the same. Also, the CollectionWrapper can hide certain things from the client code - from example, it can disallow mutation to the collection by not having the methods setThing and removeThing. This approach to decoupling client code from the concrete data structure seems IMHO pretty good. Is this approach common? What are it's downfalls? Is this used in practice?

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  • Does Googlebot (and/or search engines) index a forwarded page? [duplicate]

    - by user2889419
    This question already has an answer here: HTTP and HTTPS impacts on SEO 1 answer Let's say I have example.com domain, and I force the user to use the HTTPS over HTTP. The question is as browsers just accept and load the forwarded/new page (when the request for http://example.com - https://example.com), does the Googlebot (or other search engines) accept the forwarded page and index the new page and just ignore the old page? In other word, does search engines accept HTTPS beside the HTTP?

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  • Should I design and then look for a CMS or vice versa? [closed]

    - by Livingston Storm
    I am currently designing an e-commerce site, and unfortunately my PHP is garbage at the moment so open source CMS's are out of the question. I am debating between Joomla and Big Commerce and as the title states I am unsure of whether to build first or try the CMS first to see what limitations I will face. I couldn't find any previous questions on this site, forgive me if this is a stupid/commonly asked question. Thanks for any feedback

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  • How to Install Ubuntu by Replacing windows but without formatting other partitions

    - by Valmik Kalathia
    I'm using Windows 7 on my PC (1 GB RAM,160 GB HDD). I want to install Ubuntu and remove Windows 7 I have Partitioned my PC into 2 drives , C Drive - 40 GB and D Drive - 120 GB. I want to install Ubuntu on C drive without formatting D drive so how can I do that ? I know that I will have to select "Something Else" option when Installation Type Screen appears but I don't know how to install Ubuntu in C drive after clicking on "Something Else Button".My question looks kinda similar to this question but its not

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  • How to Get on Google's Top 10 List

    A question I often asked by new clients is why some websites rank higher on Google than others? This question can be difficult to answer because of the number of variables involved and the fact that Google's search algorithms are closely guarded secret. However, there are a number of standards which affect every website regardless of its topic, purpose, or age.

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  • How to find out where the "grub" is installed

    - by amoooc
    My Ubuntu Server 12.04 LTS asking me during "apt-get dist-upgrade" where to install "GRUB" update. So how i can simply found out which partition/disc is the proper answer? I mean how to found out where GRUB is currently installed? I found similar question and answer but how to do it without installing additional script? I will be grateful for your advice. Similar question: How to know the partition where grub is installed Cheers :)

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  • What Are Search Engine "Spiders" and How Do They Work?

    Although the question "What Are Search Engine "Spiders" and How Do They Work?" may seem a geeky one it is actually an important question for all internet marketers and one that you should have at least a basic understanding of the answer to. Spiders are automated software agents...

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  • Boosting Up Your Search Engine Ranking With SEO

    Why do websites need high search engine rankings? That's a question not many people can answer. You may think this is a silly question, especially if you are in the business of search engine marketing. Nonetheless, I think the majority of people really don't know much about using search engine marketing.

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  • 11g R2 RAC Expert ????????? ~?????????~

    - by user763243
    ??????????????????????????????????????????????????????????????????????··· ??1??????????HDD????????????????????????????????????????????????HDD?????????????????????5?????DVD???????????????(???????????????????? ?)?????????????? IT????????????????????RAID????????????????????????????????????????HDD?????????????????????????????????????????????????????????????HDD???????????????????6????1?8?????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????···orz ???RAC?????????????????????????·?????????????????????????????????????????????iPhone????????????????????WiFi??????????????????????????????????????????????????????????????????????? ??????????????????????????????????3G??????????????????????????????????????????????????????? ???????????????????????????????????????????PDF??????????????????????????????????????????????????????????????????????????????(????????????)???????????????????????????????????????????????????PDF?????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? ???????????????????????????iPhone???????????????????????????????????????????????????????????????????????? ??????????????????????????????????????????????????????????????????????????????????????????????????(??)????????????????????

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  • Dell VRTX - slow cluster shared storage

    - by NorbyTheGeek
    I have a brand new Dell VRTX box set up as a Failover Cluster running HA Hyper-V virtual machines. This is my first time setting up clustering, and my first time with one of these boxes, so I'm sure I've missed something. The virtual machines are experiencing high disk latency and bad performance when accessing their VHD(x) files located on a Cluster Shared Volume. The VRTX has 10 x 900 GB 10K SAS drives in RAID 6 configuration, and the VRTX has the redundant Shared PERC 8 controllers. Both blades have full access to the virtual disks. There are two M520 blades installed, each with 128 GB RAM. MPIO is configured for the PERC 8 controllers. Operating system on the blades is Server 2012 (NOT R2). The RAID 6 array is split into a small (8 GB) volume for cluster quorum witness and a large (6.5 TB) volume for a Cluster Shared Volume (mounted on the nodes as C:\ClusterStorage\Volume1) An example of slow disk access: logging into a Server 2012 VM and having Server Manager come up automatically. Disk access goes to 100%, with write speeds at 20 MB or so, read speeds of 500 KB or so, and Average Response Time of over 1000 ms, sometimes spiking at 4000-5000 ms or so. It's the latency that really worries me. Is there something specific I should look at in my configuration? It doesn't seem to matter whether I use VHD or VHDX, dynamic or static.

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  • Dell 2950 Perc 6/i "physical disk" and "Enclosure(Backplane)" under Connector 1 in OMSA tree- Troubleshoot help

    - by user66357
    Just looking for someone who might know why this could occur... In OMSA, on my Dell 2950, there usually is only one "Physical Disks" child under "Enclosure (Backplane)" in the tree view. Currently, the tree looks like this: Dell PERC 6/i Integrated Connector 1 (RAID) Enclosure (Backplane) Physical Disks (1:04 good, 1:05 removed) Physical Disks (1:33 Ready but unused) Normally it's like this: Connector 1 (RAID) Enclosure (Backplane) Physical Disks (1:04 good, 1:05 good) From the front, 6 of 6 3.5" SAS drives are connected. The server is showing Slot 5 as bad and the disk as removed. It seems that the drive in Slot 5 is being sensed as external to the Enclosure. Any ideas why this would happen? Think I can get away with rebuilding the virtual disk by replacing 1:05 with 1:33? Thanks. UPDATE: The only options on the Physical Disk 1:33 were Assign as Global Hot Spare and Clear... After clearing, I assigned it as the Global Hot Spare. This allowed the rebuilding of the virtual disk. Hopefully it won't fail. I'm still unsure of the reason for this odd behavior. I'm checking the firmware next.

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  • Dell Perc 6i with FreeBSD 8.1 errors with mfi0: COMMAND xxxxxxxx TIMEOUT AFTER xxx SECONDS

    - by jDempster
    We've recently bought two Dell PowerEdge R710 servers with Perc 6i controllers and 6x 135GB SAS Drives. We'd done some pretty extensive testing on a Dell PowerEdge R510 server with a Perc 6i and 4x 135GB SAS Drives running FreeBSD 8.1 for it's wonderful ZFS support and mfiutil. We hadn't had any problems with the R510 and had got to a point where we where happy with the performance of ZFS. Since running FreeBSD 8.1 on the R710 we've been getting errors from the RAID controller. mfi0: COMMAND 0xffffff80005d1770 TIMEOUT AFTER 6178 SECONDS This usually brings the system to a stand still. But it doesn't always happen, and performs very well up until it does happen. We've been running the disk as 3 mirrored drives striped in ZFS. So far we've noticed that running the drives with RAID10 on the RAID seems to work without errors (still testing). At first I thought hardware error as we'd been running FreeBSD on the R510 with the same controller without any issues. But both R710 have the same issue. All controllers are running the same firmware.

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  • VMWare ESX, storage over 2TB

    - by Phliplip
    Hi, First of, i'm a webdeveloper and my server experience lies in setting up FreeBSD servers for webserver. I'm working on a project for at photographer, and i'm hired to develop a new online photo ordering system - where user of course can view their photos :) They have a massive need of storage, thus we have bought a HP G6 and 8x1TB SATA HDD. Our plan is to install VMWare ESX 4.0, running multiple virtual machines; FreeBSD 8 for webserver and some windows servers. Allready done that. Then mount one big storage to the BSD, and share it through Samba to the WinServers. The raid is set up with an array of 2x 1TB to handle the VMs. And the rest is setup as 3 2x1TB to handle the photo-data. Thus 2.73TB for photo-data (the raids are 1+0). Now if we add a datastore in the ESX and add the 3 LUNs we can get a datastore of 2.74TB. But i don't se how i can add this datastore direct to the VM. Only the BSD VM needs access to this. Only way is to create a VirtualDisk, with a max of 2TB (8MB blocksize). This is because the datastore where we save the virtualdisk has a maximum filesize of 2TB. Then add it as a harddisk to the BSD VM. In the 'Add Harddisk' pane for the VM, i see an option for Raw Disk Management. I think this is to access the datastore or the raid directly. Only problem is that its greyed out! Can i access the datastorage directly from the BSD? Without creating and adding virtualdisk.

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  • RAID1 Broken Mirroring

    - by Sanoj
    I'm having a little server with Windows Small Business Server 2003. I'm using RAID1, via a HighPoint Rocket RAID 1640 RAID-card, using two harddrives. This week the server alarmed, and durig reboot I got the error-message Broken Mirroring (User Manual page 30). I had a few alternatives (see the manual), first I tried Continue, but the server restarted during boot. Next time I took Power Off, and replaced the oldest harddrive with a new one, and when I booted, I selected Rebuild. Then I selected the new harddrive to be the new one. The rebuild-procedure started and a progress bar at 0% showed up, but after a few seconds I got the message Copy Failed!, then the server booted and Windows Server started. Now it works fine. But I guess that I'm just using one harddrive now, and it's not mirrored. I haven't touched the server since then (two days ago). What should I do now? I have no experience of this situation. Anyone that have some guidance?

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  • Bad Blocks Exist in Virtual Device PERC H700 Integrated

    - by neoX
    I have a DELL server with PERC H700 Integrated controller. I've made RAID5 with 12 harddrives and the virtual device is in Optimal state, but I receive such errors under linux: sd 0:2:0:0: [sda] Unhandled error code sd 0:2:0:0: [sda] Result: hostbyte=0x07 driverbyte=0x00 sd 0:2:0:0: [sda] CDB: cdb[0]=0x88: 88 00 00 00 00 07 22 50 bd 98 00 00 00 08 00 00 end_request: I/O error, dev sda, sector 30640487832 sd 0:2:0:0: [sda] Unhandled error code sd 0:2:0:0: [sda] Result: hostbyte=0x07 driverbyte=0x00 sd 0:2:0:0: [sda] CDB: cdb[0]=0x88: 88 00 00 00 00 07 22 50 bd 98 00 00 00 08 00 00 end_request: I/O error, dev sda, sector 30640487832 sd 0:2:0:0: [sda] Unhandled error code sd 0:2:0:0: [sda] Result: hostbyte=0x07 driverbyte=0x00 sd 0:2:0:0: [sda] CDB: cdb[0]=0x88: 88 00 00 00 00 07 22 50 bc e0 00 00 01 00 00 00 end_request: I/O error, dev sda, sector 30640487648 But all disk are in Firmware state: Online, Spun Up. Also there is not a single ATA read or write error in any disk in the raid (I check them with smartctl -a -d sat+megaraid,N -H /dev/sda). The only strange thing is in the output in megacli: megacli -LDInfo -L0 -a0 ... Bad Blocks Exist: Yes How could there be bad blocks in a Virtual Drive, which is in optimal state and no disk is broken or even with a single error? I tried "Consistency Check", but it finished successfully and the errors are still in dmesg. Could Someone help me to figure it out what is wrong with my raid?

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  • Hardware for a home server running Windows Server 2008 R2 Hyper-V or Microsoft Hyper-V Server 2008 R2

    - by David Hayes
    Hi, I'm planning to build a server to do the following Act as a file server (videos, pictures music) Run Squeezebox server Run Zune Software to allow wireless syncing to Windows Phone 7 I'd also like to aim for Low power usage (i'd settle for less than the 90-100Watts I'm using atm Flexibility, I might want to add a web server or sharepoint or... Something I can learn/test on, work is mainly a Windows shop but I do have Linux experience too I'd like to take a look at App-V (application virtualization) too I'd like it to cost less than $1000 Quiet would be nice but not essential (it'll be in the basement) I'm thinking of getting a technet subscription to get access to Windows Server 2008 R2 at a reasonable price ($199) So my plan was this Get a bunch of 2TB Caviar green drives to RAID up (RAID 1 or 6 probably) Get a Quad core CPU (Intel i5/i7 probably) Install a Hypervisor Install w2k8 R2 Storage Server for a NAS Install Windows 7 Pro to run Zune/Squeeze box Install any other machines I want to play with Questions Can anyone see any issues with this or have any better ideas? Do you think I'd need an i7 over an i5? Is 4 cores enough/too much? Can anyone sugest a nice, reasonably priced case that will hold 6-8 drives and stay cool Should I wait for Sandy Bridge parts?

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  • Is it possible to shrink the size of an HP Smart Array logical drive?

    - by ewwhite
    I know extension is quite possible using the hpacucli utility, but is there an easy way to reduce the size of an existing logical drive (not array)? The controller is a P410i in a ProLiant DL360 G6 server. I'd like to reduce logicaldrive 1 from 72GB to 40GB. => ctrl all show config detail Smart Array P410i in Slot 0 (Embedded) Bus Interface: PCI Slot: 0 Serial Number: 5001438006FD9A50 Cache Serial Number: PAAVP9VYFB8Y RAID 6 (ADG) Status: Disabled Controller Status: OK Chassis Slot: Hardware Revision: Rev C Firmware Version: 3.66 Rebuild Priority: Medium Expand Priority: Medium Surface Scan Delay: 3 secs Surface Scan Mode: Idle Queue Depth: Automatic Monitor and Performance Delay: 60 min Elevator Sort: Enabled Degraded Performance Optimization: Disabled Inconsistency Repair Policy: Disabled Wait for Cache Room: Disabled Surface Analysis Inconsistency Notification: Disabled Post Prompt Timeout: 15 secs Cache Board Present: True Cache Status: OK Accelerator Ratio: 25% Read / 75% Write Drive Write Cache: Enabled Total Cache Size: 512 MB No-Battery Write Cache: Disabled Cache Backup Power Source: Batteries Battery/Capacitor Count: 1 Battery/Capacitor Status: OK SATA NCQ Supported: True Array: A Interface Type: SAS Unused Space: 412476 MB Status: OK Logical Drive: 1 Size: 72.0 GB Fault Tolerance: RAID 1+0 Heads: 255 Sectors Per Track: 32 Cylinders: 18504 Strip Size: 256 KB Status: OK Array Accelerator: Enabled Unique Identifier: 600508B1001C132E4BBDFAA6DAD13DA3 Disk Name: /dev/cciss/c0d0 Mount Points: /boot 196 MB, / 12.0 GB, /usr 8.0 GB, /var 4.0 GB, /tmp 2.0 GB OS Status: LOCKED Logical Drive Label: AE438D6A5001438006FD9A50BE0A Mirror Group 0: physicaldrive 1I:1:1 (port 1I:box 1:bay 1, SAS, 146 GB, OK) physicaldrive 1I:1:2 (port 1I:box 1:bay 2, SAS, 146 GB, OK) Mirror Group 1: physicaldrive 1I:1:3 (port 1I:box 1:bay 3, SAS, 146 GB, OK) physicaldrive 1I:1:4 (port 1I:box 1:bay 4, SAS, 146 GB, OK) SEP (Vendor ID PMCSIERA, Model SRC 8x6G) 250 Device Number: 250 Firmware Version: RevC WWID: 5001438006FD9A5F Vendor ID: PMCSIERA Model: SRC 8x6G

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  • Resizing a LUKS encrypted volume

    - by mgorven
    I have a 500GiB ext4 filesystem on top of LUKS on top of an LVM LV. I want to resize the LV to 100GiB. I know how to resize ext4 on top of an LVM LV, but how do I deal with the LUKS volume? mgorven@moab:~% sudo lvdisplay /dev/moab/backup --- Logical volume --- LV Name /dev/moab/backup VG Name moab LV UUID nQ3z1J-Pemd-uTEB-fazN-yEux-nOxP-QQair5 LV Write Access read/write LV Status available # open 1 LV Size 500.00 GiB Current LE 128000 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 2048 Block device 252:3 mgorven@moab:~% sudo cryptsetup status backup /dev/mapper/backup is active and is in use. type: LUKS1 cipher: aes-cbc-essiv:sha256 keysize: 256 bits device: /dev/mapper/moab-backup offset: 3072 sectors size: 1048572928 sectors mode: read/write mgorven@moab:~% sudo tune2fs -l /dev/mapper/backup tune2fs 1.42 (29-Nov-2011) Filesystem volume name: backup Last mounted on: /srv/backup Filesystem UUID: 63877e0e-0549-4c73-8535-b7a81eb363ed Filesystem magic number: 0xEF53 Filesystem revision #: 1 (dynamic) Filesystem features: has_journal ext_attr resize_inode dir_index filetype extent flex_bg sparse_super large_file huge_file uninit_bg dir_nlink extra_isize Filesystem flags: signed_directory_hash Default mount options: (none) Filesystem state: clean with errors Errors behavior: Continue Filesystem OS type: Linux Inode count: 32768000 Block count: 131071616 Reserved block count: 0 Free blocks: 112894078 Free inodes: 32044830 First block: 0 Block size: 4096 Fragment size: 4096 Reserved GDT blocks: 992 Blocks per group: 32768 Fragments per group: 32768 Inodes per group: 8192 Inode blocks per group: 512 RAID stride: 128 RAID stripe width: 128 Flex block group size: 16 Filesystem created: Sun Mar 11 19:24:53 2012 Last mount time: Sat May 19 13:29:27 2012 Last write time: Fri Jun 1 11:07:22 2012 Mount count: 0 Maximum mount count: 100 Last checked: Fri Jun 1 11:03:50 2012 Check interval: 31104000 (12 months) Next check after: Mon May 27 11:03:50 2013 Lifetime writes: 118 GB Reserved blocks uid: 0 (user root) Reserved blocks gid: 0 (group root) First inode: 11 Inode size: 256 Required extra isize: 28 Desired extra isize: 28 Journal inode: 8 Default directory hash: half_md4 Directory Hash Seed: 383bcbc5-fde9-4720-b98e-2d6224713ecf Journal backup: inode blocks

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  • Configuration for a two machine ESXi cluster using VSA to present local storage to VMs

    - by MDMarra
    I'm designing a little vSphere 5 cluster for one of our remote sites. We have some IBM x3650s that have 6x 300GB 10K RPM drives in them, along with dual quad core CPUs and 24GB RAM. Because we use HP P4500 G2s at our primary site, we have licenses available for HP P4000 VSAs. I thought that this would be the perfect opportunity to use them. Below is a basic drawing of what I want to accomplish: I want to run a P4000 VSA on each server and run them in a Network RAID-10 (Lefthand speak for network mirroring, think of it as RAID 1 across nodes or as an active/active storage cluster). I will then present this storage to guests that will run on this mini-cluster. It will be managed by a vCenter Server on our main site. All connections will be GbE with two dedicated to storage. Management and Data will share a pair of connections, since I don't expect there to be high load. These servers are just there to provide directory services, dhcp, printing, etc. Does anyone see anything potentially wrong with this approach? Is this the best way to do this without adding additional dedicated storage heads? Are there any pitfalls in this design, besides the lack of dedicated Data/Mgmt interfaces?

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  • Installing SATA dvd burner on machine with no spare SATA ports/connectors

    - by Faheem Mitha
    Greetings. I have the following motherboard Tyan Thunder K8WE S2895A2NRF Motherboard - extended ATX - nForce Pro 2200/2050 - Socket 940 - UDMA133, Serial ATA-300 (RAID) - 2 x Gigabit Ethernet - FireWire - 6-1 channel audio This is part of a computer that was assembled in the winter of 2006/2007. The user manual says the following with regard to SATA Integrated SATAII Generation 1 Controllers (from NForce Professional 2200) Two integrated dual port SATA II controllers Four SATA connectors support up to four drives 3 Gb/s per direction per channel NvRAID v2.0 support Supports RAID 0, 1, 0+1 and JBOD. I just purchased a SATA DVD burner. Here is the page for the product http://www.amazon.ca/gp/product/B002QGDWLK/ The problem I am facing is that I already have 4 SATA drives installed. I don't want to remove any of them. However, I want the DVD burner above installed as well. The person I am consulting with here (Bombay, India) tells me that my four available SATA ports are filled, and that my only option is to install a SATA card into the one free PCI slot on the motherboard. However, he says that with this setup I will not be able to boot from the DVD drive. Are these statements correct, and what are my other options if any? Even it the statements in the last para are true, I suppose I could use one of the motherboard connectors/ports there are currently being used with the hard drives with the DVD drive, and use the "add-on" connector with one of the hard drives. Not all the 4 hard drives need to be bootable. BTW, despite having read through http://en.wikipedia.org/wiki/Serial_ATA#Cables.2C_connectors.2C_and_ports I am fuzzy on the differences between connectors, cables and ports. Thanks in advance.

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