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  • Installing a Wl-138g wireless NIC on ubuntu server

    - by Narcolapser
    So I have this little server that I've been working on as a hobby. But due to changes in living arrangements I have move and it won't have access to a wired lan. So I need to install a wireless adapter i had sitting around. But most tutorials I have run across are either out dated, or about ubuntu desktop and talk about things using a GUI. So my question is firstly is there a utility for identifying and downloading drivers for new hardware. that would save my having this problem in the future. If not, how do i go about installing said wireless NIC? ~N

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  • How to do a hexdump of first track of HDD?

    - by Daniel Gratz
    How would i do a hexdump in Ubuntu for the first track of a HDD? I am looking for a winhex-esque output if that makes sense. The first track has 63 sectors, each 512 bytes long. I tried dd if=/dev/sda bs=1 count=512 | hexdump -C but that only gave me what appears to be the MBR, or first sector of the HDD. I guess i am confused about what bs and count should be. Bs means how many bytes to display and count is how many multiples of bs? Thanks!

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  • How to discover true identity of hard disk?

    - by F21
    I have 2 fake external hard drives that claim to have a storage capacity of 2TB. I pulled the enclosure apart and the hard drives seems to be refurbished ones with their labels replaced as Barracuda LP 2000 GB labels (the serial numbers on both labels are the same). Interestingly, one of the drives have 160G written on it with pencil. However, the counterfeiters seem to have done something to the firmware, because CrystalDiskInfo reports them as 2TB ST2000DL003 drives. I then delete the 1.81 TB partition in Windows disk management and tried to create a new one and format it. Once I get to this point, the drives would make some noise that is common to dying drives. I am not interested in using these drives for production, but I am interested in finding the true identity (manufacturer/serial number/model number, etc) and restoring it to their factory defaults with the right capacity. Can this be done without any special equipment? This would be an interesting learning exercise. Some pictures of the drives in question: Here are the screens from CrystalDiskInfo: Note the serial numbers are the same (these are 2 different drives!). How is this done? Did they have to tamper with the controller board? I would assume that changing the firmware doesn't change the serial number at all.

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  • Windows File Sharing - Long Initial Delay

    - by Isaac Sutherland
    I have two Windows 7 machines connected to a router. I created a shared folder on machine A, and I can access it from machine B. The transfer speed is great. However, there is sometimes a long initial delay when I try to access the shared folder from machine B. I'll click to open the folder, and windows explorer pauses for a few minutes before actually loading the contents of the folder. After it loads, however, I can navigate the subfolders and edit files with no noticeable delay. Then, some time later, I will get the huge delay on saving a file, after which subsequent saves have no delay. What is the problem here, and how can I fix it?

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  • Roughly cutting Fibre Cables

    - by Bryan
    I recently asked a question about which type of Fibre optic cable to use for my installation. We have now found a cable type and supplier and I'm about to order the cable (OM3, Tight Buffered, 12 Core), however I have a further question: We are shortly moving in to a new building (still being constructed) and we are about to get a window in which we will be able to run any cabling that we need. How should I roughly cut the fibre? Can I just use some heavy shears to cut through the cable? I'm aware that doing so will damage the ends, but will the damage be limited to the ends, or could the cracks/fractures continue up the length of the cable? p.s. I have already allowed for several metres of extra cable at each end, and I am going to get a specialist in to terminate the fibres.

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  • Preparing a new physical system with VMWare

    - by Max
    I need to create a new installation of Windows, but at the same time I need this computer. So I decided to create a new physical disk from within VMWare, install windows/drivers/software and then just replace the HDD in the computer. I've bought a new HDD, split it into two partions and installed Windows 7 using the VMWare's ability to use phusical disks. I can see the windows files and directories that have been created on this partition, but when I'm replacing the HDD in the host machine it cannot boot from it. Why is that? Is it at all possible to create a bootable physical disk with VMWare or I should create a virtual disk and then use some HDD imaging tool to copy the HDD image to a physical disk? Maybe there's a better way of installing a new system and working on the computer at the same time?

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  • How can I recover XFS partitions from a formatted HD?

    - by giuprivite
    I deleted the partition table of my HD. I wanted to format another one, but by mistake, I formatted the wrong one. Then I also created some new partition on it. Now I would like, if possible, to recover my old data. The old configuration was this: A primary NTFS partition with Windows, and a secondary partition with four logical partitions: a swap and three XFS partitions (two for Ubuntu and OpenSuSE, and one with the home for both systems). This is the output I get when I run gpart in a terminal: ubuntu@ubuntu:~$ sudo gpart /dev/sdb Begin scan... Possible partition(Windows NT/W2K FS), size(39997mb), offset(0mb) Possible extended partition at offset(39997mb) Possible partition(Linux swap), size(8189mb), offset(39997mb) Possible partition(SGI XFS filesystem), size(40942mb), offset(48187mb) Possible partition(SGI XFS filesystem), size(40942mb), offset(89149mb) Possible partition(SGI XFS filesystem), size(175044mb), offset(130112mb) End scan. Checking partitions... Partition(OS/2 HPFS, NTFS, QNX or Advanced UNIX): primary Partition(Linux swap or Solaris/x86): logical Partition(Linux ext2 filesystem): logical Partition(Linux ext2 filesystem): orphaned logical Partition(Linux ext2 filesystem): orphaned logical Ok. Guessed primary partition table: Primary partition(1) type: 007(0x07)(OS/2 HPFS, NTFS, QNX or Advanced UNIX) size: 39997mb #s(81915360) s(63-81915422) chs: (0/1/1)-(1023/254/63)d (0/1/1)-(5098/254/51)r Primary partition(2) type: 015(0x0F)(Extended DOS, LBA) size: 265245mb #s(543221849) s(81915435-625137283) chs: (1023/254/63)-(1023/254/63)d (5099/0/1)-(38912/254/2)r Primary partition(3) type: 000(0x00)(unused) size: 0mb #s(0) s(0-0) chs: (0/0/0)-(0/0/0)d (0/0/0)-(0/0/0)r Primary partition(4) type: 000(0x00)(unused) size: 0mb #s(0) s(0-0) chs: (0/0/0)-(0/0/0)d (0/0/0)-(0/0/0)r Looking the first eight lines, it seems the data are still there... but I don't know how to recover them. I have a free second HD of about 500 GB (the formatted one is 320 GB) that I can use for the recovery process.

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  • How would I force Debian to use the physical sector size on a hard disk?

    - by Confused User
    I just purchased a few new 3TB WD drives. These have physical 4k sectors, but there is some sort of layer which is providing 512B logical sectors (see the partition table below). In order to attempt to get some more speed out of my hard drives, I would like to get rid of this logical layer and actually use the physical 4k sectors. However, I can't figure out how to do this (or even if it's possible) from the man pages of fdisk and parted, or from searching Google. Does anybody know how this could be done? As to why this is relevant, this page demonstrates that meerly aligning the sectors properly can already make up to a 25% speed difference for reads, and more than 2500% for writes in some cases! Getting rid of the logical sectors in favor of the physicals ones should improve speeds even more. Thanks! $ parted /dev/sdc GNU Parted 2.3 Using /dev/sdc Welcome to GNU Parted! Type 'help' to view a list of commands. (parted) print Model: ATA WDC WD30EZRX-00M (scsi) Disk /dev/sdc: 3001GB Sector size (logical/physical): 512B/4096B Partition Table: gpt Number Start End Size File system Name Flags 1 1049kB 3001GB 3001GB zfs 9 3001GB 3001GB 8389kB P.S. I don't care about the data on the drives, I was just playing with different file systems. Also, this is my first time posting here, so please let me know if my posts should be formatted differently, etc.

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  • Which protocol do clients use when communicating with servers in a SAN

    - by Mario De Schaepmeester
    I'm trying to wrap my head around how a SAN works and how it is implemented. If I understand this well, clients wanting to access the storage devices in a SAN need to communicate with the servers via the LAN. When the SAN is implemented with Fibre Channel, these servers are Fibre Channel compliant devices, and internally in the SAN they work with the Fibre Channel Protocol. Both data and communications are supported by Fibre Channel. But which application-layer protocol do the clients use in the LAN to communicate with the servers? Is the data simply transferred via ethernet as well? This is some part I am stuck on. I went trough a lot of sources but most sources don't really mention protocols and if they do, they only mention FCP.

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  • can't connect to vsftpd from outside network

    - by rick
    i know this has been asked many times before, but nothing seems to resolve my issue. i have vsftpd running on ubuntu 10.04. i can connect with ftp localhost on the machine. i can connect from another machine in my network. i just cannot connect from outside. the machine is behind an airport extreme managed by airport utility on a mac. 21 is open as per nmap: macmini:~$ nmap localhost Starting Nmap 5.21 ( http://nmap.org ) at 2011-04-10 23:49 EDT Nmap scan report for localhost (127.0.0.1) Host is up (0.00045s latency). Hostname localhost resolves to 2 IPs. Only scanned 127.0.0.1 rDNS record for 127.0.0.1: localhost.localdomain Not shown: 997 closed ports PORT STATE SERVICE 21/tcp open ftp 22/tcp open ssh 631/tcp open ipp netstat says 21 is listening: macmini:~$ netstat -lep --tcp | grep ftp (Not all processes could be identified, non-owned process info will not be shown, you would have to be root to see it all.) tcp 0 0 *:ftp *:* LISTEN iptables: macmini:~$ sudo iptables -L Chain INPUT (policy ACCEPT) target prot opt source destination Chain FORWARD (policy ACCEPT) target prot opt source destination Chain OUTPUT (policy ACCEPT) target prot opt source destination when i try to connect from my external IP (or a dyndns name which resolves there) it times out. ("control connection timed out") as i know very little about networking, i feel like something may jump out as clearly wrong?

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  • How do I mount a USB floppy disk drive?

    - by Jocky B
    I have tried to mount my usb floppy disk drive in 11.04 Natty. So far I have managed to use the udisks --mount/dev/sdf command in terminal, but get a message that I have not stated a filetype john@john-desktop:~$ udisks --mount /dev/sdf Mount failed: Error mounting: mount: you must specify the filesystem type This is the result I get when trying to mount the usb floppy disk drive. Anyone know how to proceed?

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  • Why would you use EAP-TTLS instead of PEAP?

    - by Ivan Macek
    As I understood EAP-TTLS and PEAP share same level of security when implemented in wireless networks. Both only provide server side authentication via certificate. The drawback of EAP-TTLS can be non native support in Microsoft Windows so every user has to install additional software. The benefit of EAP-TTLS can be support for less secure authentication mechanisms (PAP, CHAP, MS-CHAP) but why would you need them in modern and properly secure wireless system? What are you opinions? Why should I implement EAP-TTLS instead of PEAP? Let's say that I have most Windows users, medium Linux users and least iOS, OSX users.

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  • is a mini PCIe SSD worth it?

    - by Narcolapser
    Question: Is getting a mini-PCIe worth investing in? Info: I have a an Acer Aspire 1 n270. It has this mini PCIe slot that is just sitting there empty. I would like to change this, and I would like to speed up my boot time. So I've been considering getting a mini-PCIe SSD. They are about the same price as faster same size drives of the 2.5" variation. The advantage of the mini-PCIe card is that I can have my HDD still. So I have good boot time, but still have the storage of my HDD. What I want to know is: will this allow me to spin down the HDD more often allowing me to save power? Will the OS (Ubuntu 10.04 LTS) see them as separate drives? Is there anything that the mini-PCIe slot could be better used for? Thanks. ~n

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  • What is "2LUN" mode in connection with RAID?

    - by naxa
    I've came across RAID products that also list JBOD (just a bunch of disks) mode and 2LUN mode. What the heck is 2LUN mode? I could not find a description; the closest thing seems to be LUN 'logical unit number' but I don't get the 2LUN thing. UPDATE 1 This is what Wikipedia has to say about JBOD: JBOD (derived from "just a bunch of disks"): an architecture involving multiple hard drives, while making them accessible either as independent hard drives, or as a combined (spanned) single logical volume with no actual RAID functionality. So JBOD can actually mean two different (albeit related) things. Answer of Guest says 2LUN means no spanning. Does this suggest that 2LUN would simply mean the JBOD-variant with no span?

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  • finding the best network latency between two countries

    - by Yoav Aner
    I know there are many tools to test for bandwidth and latency, but they all rely on having at least one host from which you can run those tests. I wonder whether there's an online source or some other way to guestimate the latency or speed between two countries (in general). For example, would a customer in Japan get lower latency if the server is located in Singapore or Australia? Is a user in India likely to get higher download speed from a server in the UK or in the US? Are there any online resources or some clever ways to answer those questions with a reasonable degree of accuracy? [UPDATE]: Thanks for the great suggestions from Raffael Luthiger. I didn't know about those looking glass servers. The submarine cable maps were also really cool to discover (Thanks to Jesper Mortensen). Also seems really wise if I could ask those network professional in the area for their experience, but obviously I don't have access to those. At least some of them are on SF :) However, I'm still a little unsure how to combine those resources to give me some measurements. This is the information I have: Two countries (A,B). I do have IP addresses of customers in country A (I can obtain those from the web server log files for example). Presumably I can find some looking glass servers in country B and run a trace to those IPs. What's the best measurements to use? Are there any scripts that help automate at least some of this process?

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  • Getting an alert when my oracle database goes up or down

    - by CodeSlave
    How can I get an e-mail alert when my oracle database comes up or down? I have a database that I need to know when it goes down (it would be nice to know if it has come back up), preferably from a remote machine. Conceivably I could hack together something that TNSPings my DB and e-mails me when that changes, but I'm hoping there's a free package out there. Something that would run on windows. Any strong recommendations?

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  • DFS-R (2008 and R2) 2 node server cluster, all file writes end in conflictAndDeleted

    - by Andrew Gauger
    Both servers in a 2 server cluster are reporting event 4412 20,000 times per day. If I sit in the conflictAndDetected folder I can observe files appearing and disappearing. Users report that their files saved by peers at the same location are overriding each other. The configuration began with a single server, then DFS-R was set up using the 2008 R2 wizard that set up the share on the second server. DFSN was set up independently. Windows users have drives mapped using domain based namespace (\domain.com\share). Mac users are pointed directly to the new server share created by DFS-R. It is PC users indicating most of the lost files, but there has been 2 reports by Mac users about files reverting.

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  • Samba 'include' a per user config script

    - by cb0
    It is possible to use the include = /somepath/%u.smb.conf in the global section to call a script /somepath/cb0.smb.conf if the user cb0 connects to the samba server. Unfortunately this does not wotk for me because testparm alway gives me Can't find include file /somepath/.smb.conf When I connect to the server I can enter a username and pass but it alway rejects the connection. I'm using Samba Version 3.2.5 How can I achieve to load a custom user script depending on the user that is connecting ?

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  • Server hard disk read speed and client download speed, is there a connection? [closed]

    - by Mywiki Witwiki
    Ok so a client's download speed is only as fast as a server's upload speed, and vice versa. Based on the answers to this post: Does upload speed depend upon download speed of the server? In other words, the data transfer rate between the two computers is only as fast as the speed of the "bottleneck". Let's pretend the two computers are in two different networks and both have 100Mbps internet connection. Ben wants a copy of a file in Mark's computer hard disk with 30Mbps read speed. Does this mean that Ben can download the file at a speed of around 30Mbps only, despite having an internet connection faster than 30Mbps?

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  • mac external-hard-disk "software update"

    - by Pietro
    When I make a software update, the files are downloaded on my MacBook's internal hard disk. How can I set a different hard disk as default? I suppose the files related to the software update are compressed packages that have to be saved, opened and decompressed. I would like to use the internal HD just to update MacOS, without storing any temporary files. Thank you! Pietro MacBook Pro 2009, 256 GB SSD, MacOSX 10.6.4

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  • File system concepts (df command)

    - by mkab
    I'm finding it difficult to understand some stuffs about the df command. Suppose I type df and I have the following output Filesystem 1k-blocks Used Avail Capacity Mounted on /dev/da0s1 some number some number number percentage /win /dev/da0s2 some number some number number percentage /win/home /dev/da0s3a some number some number number percentage / devfs some number some number number percentage /dev /dev/da0s3g some number some number number percentage /local /dev/da0s3h some number some number -number 102% /reste /dev/da0s3d some number some number number percentage /tmp /dev/da1s3f some number some number number percentage /usr /dev/da1s3e some number some number number percentage /var /dev/da1s1a some number some number number percentage /public Are the answers to the following questions correct? How many physical drives do I have? Ans: 2. da0s1 and da1s1 How many physical partitions on each disk? Ans: 8 for da0s1 and 1 for da1s1 How many BSD partition on each physical partition Ans: Impossible to determine. We have to use the -T to determine its type How is it possible for the file system /dev/da0s3h filled at 102%? And where is this overflowed data written?Ans: I have no idea for this one Thanks.

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