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• What causes "All-in-one USB Card Reader" to create 6 drives that always appear in Disk Management?

  - by tim11g

  I installed a "All-in-one USB Card Reader" to read SD cards and other media. It has caused six new drives to appear in Disk Management with six new drive letter assignments. These drives and letters are always present, even when there are no cards in the reader. When unused, they are labeled "No Media". Why does this multifunction reader cause these phantom Disks to appear and consume drive letters? Every USB port can (and does) allow removable media to be mounted and assigned a drive letter, and the drive letter assignment "disappears" when the USB drive is removed. Why are these card reader's drives and letters staying allocated permanently? Is there anything that can be done to make the slots work like a typical USB drive? (The reader is in fact connected to USB).

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• Remove Write Protection from USB

  - by Vasile Marian Falama?

  My flash USB is write protected and I've tried every possible methods I've encountered over the internet, to get rid of this. Accessing the usb is not working. Format from my computer, is not working. Clear attributes with DiskPart is not working (can't be cleaned, Current Read-only State is Yes but Readonly is set to false... With Disk Management, I can't delete the partition... Is there any other method... With a specific software or somehow? Edit : I tried this on Windows 8.1.

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• Re-Initialize RAID-0 in software after card failure

  - by Ben

  I'm working on a Friend's WD MyBook "1TB" HDD that is not mounting. When I got in to it, I discovered that it is really 2 500GB HDD's set up as RAID-0. It appears that the drives themselves are fine, but that the logic board has failed. My questions is this: can I re-initialize the RAID-0 using software RAID so that I can recover the data to another drive? If so, how and which software RAID would be best (Preferably open source. any platform OK).

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• procedure for installing Master agent , host agent and Navi agent on different platforms

  - by wildchild

  can somebody help walk me through the procedure for installing Master agent , host agent and Navi agent on different platforms like Solaris and AIX for EMC Control Center.. Any help will be appreciated..I am unable to find it in Power link thanks!

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• How to select a server that supports Windows scheduled file IO

  - by Kristof Verbiest

  Background: I am developing an application that needs to read data from disk with a fairly consistent throughput. It is important that this throughput is not influenced by other actions that happen on the disk (e.g. by other processes). For this purpose, I was hoping to use the 'Scheduled File I/O' feature in Windows (throught the GetFileBandwithReservation and SetFileBandwithReservation functions). However, this StackOverflow question has thought me that this feature is only available if the device driver supports it. Currently I have no computer at my disposition that seems to support this feature (I have an HP Proliant server and a Dell Precision workstation). Question: If I were to order a new server, how can I know beforehand if this feature will be supported by the device driver? How 'upscale' does the server have to be? Has anybody used this feature with success and cares to share his experiences?

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• RAID across SAS controller ports

  - by BlueGene

  Hi, I'm managing a HP DL360 G5 machine. It has a SAS controller with two ports. Port 1 is attached to 4 drive bays and Port 2 has 2 bays. The machine currently has 3 drives connected to Port 1 with RAID 5 configuration. I'm trying to max out the bays by adding 1 disk in port 1 and 2 in port 2. Can I group those three disks(1 disk-port, 2 disks-port 2) in a RAID 5 configuration?

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• Throughput = BS * IOPS?

  - by Marvin

  I've seen in many places that throughput = bs * iops should be true. For example writing at 128k block size to a SAS disk that can support 190 IOPS should give a throughput of ~23 MBps - 23.75(MBs) = 128(BS)*190(SAS-15 IOPS)/1024. Now when I tested it in a VM against a monster NetApp filer I got theses results: # dd if=/dev/zero of=/tmp/dd.out bs=4k count=2097152 8589934592 bytes (8.6 GB) copied, 61.5996 seconds, 139 MB/s To view the IO rate of the VM I used iostat and esxtop, and they both showed around 250 IOPS. So to my understanding the throughput was supposed to be ~1000k: 1000(KBs) = 4(BS)*250(IOPS). dd of 8GB is twice the size of RAM of course, so no page caching here. What am I missing? Thanks!

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• Can I mount a volume at /Users on OS X?

  - by bshacklett

  I'm considering purchasing a SSD for my Macbook Pro. Unfortunately, I can't afford a large one, so I'm thinking of moving the current hard drive to the optical bay. On a Linux system, I would mount the second drive at /home. Given that OS X is Unix, I'm thinking it should be possible to do the same thing. Has anyone done this before? Edit: I should mention I'm running Snow Leopard.

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• Is there a way to do something like LVM over NFS?

  - by warren

  I realize that since NFS is not block-level, LVM can't be used directly. However: is there a way to combine multiple NFS exports (from, say, 3 servers) into one mount point on a different server? Specifically, I'd like to be able to do this on RHEL 4 (or 5, and re-export the combined mount to my RHEL 4 server). expansion The reason I pegged lvm is that I want a bunch of exported mounts (servera:/mnt/export, serverb:/mnt/export, serverc:/mnt/export, etc) to all mount at /mnt/space so that my /mnt/space on this server (serverx) as one large filesystem. Yes, I know that re-exporting is generally a Bad Thing™ but thought it might work, if there was a way to accomplish this on a newer release as opposed to an older one From reading the unionfs docs, it appears that I can't use it over a remote connection - have I misread it? More accurately, since Union FS merges the contents of multiple branches, but makes them appear as one, it doesn't seem to go in reverse: I'm trying to mount a bunch of NFS points in a merged fashion, then write to them - not caring where data goes, a la LVM .

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• Unlimited online backup space for fixed price using rsync/FTP/other simple protocol

  - by barrycarter

  Many companies offer unlimited online backup space for a fixed price (mozy.com, twitter.com/allmydata, onlinestoragesolution.com, etc), but they either use proprietary non-Linux-friendly software and/or have gone out of business and/or don't actually work. Who offers reliable unlimited online backup space for a fixed price that's compatible with rsync, FTP, or other generic/open source file transfer protocols? Or, has anyone written software that lets me treat Mozy's/etc space as though it were regular file space (eg, "mozyfs"?)

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• USB 3.0 hard disk not detected on a particular host controller?

  - by Alvin Wong

  I have a USB 3.0 hard disk which has always been working on my desktop with an XHCI. Now I just bought a notebook with an XHCI (something with Intel's Ivy Bridge setup). The first time I plug the hard disk in its 3.0 port it is detected and working. A few hours later I try to connect it again, but seems that the notebook just ignored it! The light on the hard disk didn't blink as usual (instead it is hold at on). I then tested it with my desktop again and it is working perfectly. It gets trickier when I plug it in the USB 2.0 port of that notebook it is detected and working perfectly (despite the slower speed). Then I try to plug in an USB 2.0 USB flash drive to that USB 3.0 port, and it is detected (of course as USB 2.0). So, there are two USB 3.0 ports on my notebook's XHCI. Both of them are not working with my hard disk but working perfectly fine with my USB 2.0 UFD. What's wrong with it? When I plug in the hard disk, device manager doesn't change. I've tried re-installing the driver for the XHCI, but it changes nothing. Had I broke the USB 3.0-specific pins of both USB 3.0 ports?

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• Free Cloud Mind Map Solution

  - by Zekta Chan

  As a Software Engineer we had a lot of discussion on SE design. Although we sync every document on the development process on Google Doc, mind map just didn’t fit in Google doc yet. The best we can do is to store a copy and share it online. To me, Mind map is an ir-replaceable piece of tools (yet) as agile note taking tools. And an eFormat is even greater than a paper one, due to the portability and extensibility. Does anyone have a good solution on “cloud-sharing” mind map? (We are using FreeMind at the moment) Thanks

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• Software to store frequently used text in PC

  - by user15660

  Hi, I am a looking for a free software that can run on the task bar (near the system time) where I can store frequently used text like my full street address, paths of specific deep folders & files in the computer etc etc. This way I can just click the icon which should popup a screen where I should be able to copy the text/string I am looking for Any ideas? thanks in advance

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• DriveImage XML fails with a Windows Volume Shadow Service Error

  - by ssvarc

  I'm trying to image a SATA laptop hard drive, using DriveImageXML, that is attached to my computer via a USB adapter. I'm running Win7 Ultimate 64 bit. DriveXML is returning: Could not initialize Windows Volume Shadow Service (VSS). ERROR C:\Program Files (x86)\Runtime Software\Drivelmage XML\vss64.exe failed to start. ERROR TIMEOUT Make sure VSSVC.EXE is running in your task manager. Click Help for more information. VSSVC.EXE is running in Task Manager, as is VSS64.exe. Looking at the FAQ on the Runtime webpage this turned up: Please verify in Settings-Control Panel-Administrative Tools-Services that the following services are enabled: MS Software Shadow Copy Provider Volume Shadow Copy Also make sure you are able to stop and start these services. Possible reasons for VSS failures: For VSS to work, at least one volume in your computer must be NTFS. If you use only FAT drives, VSS will not function. The required NTFS volume does not need to be identical with the volume you want to image. You should make sure that VSSVC.EXE is running in your task manager. If the problems persist, registering "oleaut.dll" and "oleaut32.dll" using "regsvr32" might help. Both of those services are running and can be started and stopped without issue. Using "regsvr32" to register ""oleaut32.dll" returns successful, but "oleaut.dll" returns: The module "oleaut.dll" failed to load. Make sure the binary is stored at the specified path or debug it to check for problems with the binary or dependent .DLL files. The specified module could not be found. Some other information that might be relevant. Browsing to the drive is successful, but accessing certain folders returns an "access" error. Windows runs a permissions adder that adds the current user profile to the NFTS permissions. Could this be the cause of the issue? DriveImage XML is running as Administrator. Thoughts?

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• Excel cell references not updating when referenced cells are sorted.

  - by Robert Kerr

  There are two tables, each with 75 entries. Each entry in the 2nd table calls an entry in the first table a parent. One of my 2nd table columns contains the "Parent Price", referencing the Price column in the first table, such as "=E50". Table 1 Id Price 1001 79.25 1002 8.99 1003 24.50 Table 2 Id Price Parent Price 2001 50.00 =B2 2002 2.81 =B3 2003 12.00 =B4 The problem is when I sort the first table, none of the second table's "Parent Price" references are updated, and still point to the =E50 cell, which is no longer the correct parent. I don't want to have to name the cells if possible. What style of formula do I enter in the parent price column so that they properly track the cells in the referenced table?

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• MicroSD card isn't detected by computer, apparently usable only with phone

  - by paulcjoubert

  I have a 4GB MicroSD card that apparently only works (in the sense that the device detects and can read and write from and to the card) with my old Nokia XpressMusic 5800 phone. I have taken pictures and recorded voice notes that were saved on the card. These are accessible after the card has been removed, which tells me that the problem isn't with the card. The card could also not be locked to the phone as it would at least be detected by a computer and it would be able to write raw data to it with dd, such as /dev/zero. Also, the card is not the Nokia card that came with the phone and I have done nothing that would have caused it to be locked. (I could not find anything on Nokia's website that helps, but then again... my search was not THAT thorough.) The card works on no other device that I have tried so far. I have tried it in my Canon camera (through an adapter), but it refuses to even boot with the card inserted. My card reader (via USB cable and hub) is detected as /dev/sdx with or without the card inserted. When trying to access the card I get an "No medium found". dmesg does not report any change at all when inserting and removing the card. I would obviously like to use my card on other devices - the phone is quite old - and even a likely explanation would help. Thankyou in advance! EDIT 1: I can use the card by connecting the phone to my computer, but this is impractical and would not allow me to use the card in any other device. EDIT 2: The data on the card is not important to me at all.

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• Decyphering Seagate drive model numbers?

  - by Stefan Lasiewski

  I'm comparing Seagate's Enterprise and Desktop drives for a variety of old and new servers. These servers come from different generations, so options like size (73GB, 2TB) and interface (SATA vs SAS 3.0Gbps vs SAS 6Gbps vs SCSI Ultra320) are widely variable. I'm trying to compare the sizes, speeds and interfaces, but I'm getting thrown off by different models. Also, their website is not the best. Does anyone know of a documented explanation of the Seagate model numbers? And is there a single spreadsheet which compares the features for all drives (or all 'Enterprise' drives?). Seagate drives have model numbers like this: Model ST3600057SS 6-Gb/s SAS 600 GB None at Cheetah® 15K Hard Drives Model ST373455LW Ultra320 SCSI 73.4 GB 68-Pin LW at Cheetah® 15K Hard Drives Model ST32000644NS SATA 3Gb/s 2 TB None at Constellation™ ES Hard Drives Model ST973452SS 6-Gb/s SAS 73 GB None Savvio® 15K Hard Drives Model ST9200011FS SATA 3Gb/s 200 GB Pulsar™ Solid State Drives I understand the model numbers read something like this: ST - SOMETHING1 - SIZE - SOMETHING2 - INTERFACE Where the fields mean something like this: ST : For 'Seagate'? 'Seagate Technoligies'? SOMETHING1 - This field has number, but I'm not sure what that represents. SIZE - Size in Gigabytes. This is a number like '73' or '300' or '2000' SOMETHING2 - This field also has a number, but I'm not sure what it means. INTERFACE - This field seems to indicate the Interface. 'SS' means SAS, 'FC' means Fibre Channel, but I don't see how to distinguish between 6Gbps SAS and 3Gbps SAS, or different SATA or FC speeds. I don't see a field which indicates the RPM (15K , 10K, 7.2K) etc. Is this part of the model number?

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• Using excel, how can I count the number of cells in a column containing the text "true" or "false"?

  - by Jay Elston

  I have a spreadsheet that has a column of cells where each cell contains a single word. I would like to count the occurrences of some words. I can use the COUNTIF function for most words, but if the word is "true" or "false", I get 0. A B 1 apples 2 2 true 0 3 false 0 4 oranges 1 5 apples In the above spreadsheet table, I have these formulas in cells B1, B2, B3 and B4: =COUNTIF(A1:A5,"apples") =COUNTIF(A1:A5,"true") =COUNTIF(A1:A5,"false") =COUNTIF(A1:A5,"oranges) As you can see, I can count apples, but not true or false. I have also tried this: =COUNTIF(A1:A5,TRUE) But that does not work either. Note -- I am using Excel 2007.

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• Managing disk in a VM

  - by dst

  I'm replacing my two old rack servers with a new one that has plenty of power to take over the functionality my current servers. The server is a 4U rack mount with 16 3.5" SAS drive bays, two 2.5" bays, a Xeon E3-1230v2 CPU and 32GB of ECC RAM. My issue is the following. I would like to have a FreeBSD file server with ZFS managing disks. However, I need other VMs for e.g. a shell/git server, mail server etc. I'm wondering how to deal with the following issues: I want ZFS to fully manage the disks, so I'm not using any hardware RAID. Should I pass the SAS controller directly to the FreeBSD system as passthrough PCI? I want to maximize the reliability of the setup. On what disks should I install the hypervsor and keep server system disks? For (2) I have the option of having a RAID setup on the SAS controller and using that as system disk to store the hypervisor as well as VM images. However, this makes PCI passthrough to the file server impossible. Another option is using the two 2.5" bays. In terms of reliability how are SSDs compared to e.g. WD RE4 disks? Would it make sense to have two SSDs in software RAID as boot disks for the hypervisor or should I just go with e.g. WD RE4 disks in a software RAID setup. I also need to think about where to store the mails for the mail server, but this could be done over NFS between the VMs. BTW, this is for home use, so the load is not really that big. What I'm looking for is best practices for splitting up a server.

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• Mounting an Amazon EC2 instance on MAC OS X

  - by hinghoo

  What are some methods for transferring files to and from Amazon EC2 instances. I'm looking for solutions / tools for editing files as well as copying files to EC2 instances from both Mac and Windows. For example, what are some solutions for mounting a drive from an instance locally? Generally, what other methods are out there?

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• Adding new virtual disks to a RHEL host in ESX "live"

  - by warren

  I'm sure I've just missed which tutorial/manual page covers this, but how do you add get the guest OS to recognize that you've added new drives to it without a reboot? I have a RHEL5 guest running on ESX 4. I've added new virtual disks to the VM, but have not figured-out how to get the guest to recognize them without a reboot. Is this possible? If so, how?

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• What is the best free service to host images and mp3 files?

  - by Edward Tanguay

  I am making an educational social software silverlight application. I would like users to be able to point the application to a URL with text, images, and audio files which they have created. Many users will not have their own website to do this, so we are looking for a free service they can use to upload, and manage their own text/image/audio content. What is the best free service for non-technical users to upload and make available text, images and audio? For instance, sites.google.com allows you to upload pictures and access them via http so that would work, but that is more about making a website. For this purpose we just need the ability to upload files, without the website creation tools.

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• HP StorageWorks P4500 G2 Manager Management

  - by MDMarra

  According to the documentation, a management group should have an odd number of managers greater than 1. I have a four node SAN consisting of P4500 G2s. I plan on having two clusters with two nodes each in this management group, i.e.: -Managent_Group1 -Cluster1 -Node1 -Node2 -Cluster2 -Node3 -Node4 Are there any issues running standard managers on Node1, Node2, and Node3? After reading the documentation, I'm still unclear about whether or not cluster membership matters in quorum consistency, or if they don't matter at all.

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• Sparing level on HP EVA 4000

  - by Samuel

  One of the disks of our EVA4000 died today. This diskgroup (all volumes vraid5 with sparing level 1 and almost no space left for more volumes, 1TiB drives) is being rebuilt with "spare space" right now, and it will take at least 15 hours to do the leveling/rebuilding. We can't get a new disk until Friday. So, the question is, what would happen if another disk dies before the leveling completes? Would we lose data? And after that, how many aditional disks could die before losing data? 1 or 2? In "usual" RAID, we would be vulnerable to data loss while the rebuild takes place, but in this case the space reserved for sparing is two times the size of the bigger disk, so at the very least the effect should be the same of having two spares. Thanks in advance. Update: I have found some interesting threads about this question but still can't answer to this question, so I'm starting a bounty. http://blog.thestoragearchitect.com/2008/10/27/understanding-eva/ http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&url=http%3A%2F%2Fwww.experts-exchange.com%2FStorage%2FStorage_Technology%2FQ_25548177.html (Expert Exchange question from google).

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• Hybrid drive not booting faster than a normal HD

  - by Nigel Trotter

  I have used Windows 7 to create an image of my existing standard 160GB HD and copied this image back to a bigger 500GB Seagate hybrid drive. After copying the image to the hybrid I had to resize the partition, which was fine but after rebooting a few times to "teach" the hybrid, I have no increase in boot speed. It still takes 20-25 seconds to close down and then over a minute to start up. Is this something to do with the way the image lays itself on the drive indiscriminately? Do I need to load the OS on the drive from scratch to get the benefits? My PC with an i5 processor, is using AHCI mode.

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