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SD-CARD reader does not show in ubuntu

- by shantanu

I bought Acer asipre 4250. It have built-in SD card reader. But it is not working. Nothing show in /media or fdisk but something in dmesg. dmesg: new high-speed USB device number 3 using ehci_hcd [ 127.396733] scsi5 : usb-storage 2-2:1.0 [ 128.526562] scsi 5:0:0:0: Direct-Access Multiple Card Reader 1.00 PQ: 0 ANSI: 0 [ 128.532512] sd 5:0:0:0: Attached scsi generic sg2 type 0 [ 129.008110] ohci_hcd 0000:00:12.0: PCI INT A disabled [ 129.032083] ohci_hcd 0000:00:13.0: PCI INT A disabled [ 129.056411] ohci_hcd 0000:00:16.0: PCI INT A disabled [ 129.338026] sd 5:0:0:0: [sdb] Attached SCSI removable disk [ 129.808328] ohci_hcd 0000:00:14.5: PCI INT C disabled [ 167.728616] usb 2-2: USB disconnect, device number 3 [ 169.872284] ehci_hcd 0000:00:13.2: PCI INT B disabled [ 169.872340] ehci_hcd 0000:00:13.2: PME# enabled fdisk -l: Disk /dev/sda: 320.1 GB, 320072933376 bytes 255 heads, 63 sectors/track, 38913 cylinders, total 625142448 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk identifier: 0x0006bc6d Device Boot Start End Blocks Id System /dev/sda1 * 2048 48828415 24413184 7 HPFS/NTFS/exFAT /dev/sda2 48828416 50829311 1000448 82 Linux swap / Solaris /dev/sda3 50829312 99657727 24414208 83 Linux /dev/sda4 99659774 625141759 262740993 5 Extended Partition 4 does not start on physical sector boundary. /dev/sda5 99659776 275439615 87889920 7 HPFS/NTFS/exFAT /dev/sda6 275441664 451221503 87889920 7 HPFS/NTFS/exFAT /dev/sda7 451223552 625141759 86959104 7 HPFS/NTFS/exFAT I found another problem just right now. I format last three drives as EXT4 with disk utility. But they are showing as NTFS/exFAT in fdisk. :-(

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Kingston SD reader not working for USB3

- by user1146334

I have a Kingston 4-in-1 Multimedia reader. When my PC was formatted with Win7 it worked fine. I decided to change to Ubuntu 14.04 and now it doesn't work. If I plug it into one of the USB2 ports it works fine, but whenever I plug it into one of the USB3 ports, it thinks about it for a minute and then dies. Here's the output of dmesg when it dies [110262.148656] usb 4-1: new SuperSpeed USB device number 3 using xhci_hcd [110262.170330] usb 4-1: Parent hub missing LPM exit latency info. Power management will be impacted. [110262.266379] usb 4-1: New USB device found, idVendor=11b0, idProduct=6348 [110262.266386] usb 4-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [110262.266390] usb 4-1: Product: USB3.0 Media Reader [110262.266394] usb 4-1: Manufacturer: Kingston [110262.266398] usb 4-1: SerialNumber: 08735314400198 [110262.272929] usb-storage 4-1:1.0: USB Mass Storage device detected [110262.273239] scsi15 : usb-storage 4-1:1.0 [110263.290056] scsi 15:0:0:0: Direct-Access FCR-HS3 -0 1.00 PQ: 0 ANSI: 4 [110263.306622] scsi 15:0:0:1: Direct-Access FCR-HS3 -1 1.00 PQ: 0 ANSI: 4 [110263.323292] scsi 15:0:0:2: Direct-Access FCR-HS3 -2 1.00 PQ: 0 ANSI: 4 [110263.339858] scsi 15:0:0:3: Direct-Access FCR-HS3 -3 1.00 PQ: 0 ANSI: 4 [110263.340332] sd 15:0:0:0: Attached scsi generic sg3 type 0 [110263.340706] sd 15:0:0:1: Attached scsi generic sg4 type 0 [110263.340850] sd 15:0:0:2: Attached scsi generic sg5 type 0 [110263.340975] sd 15:0:0:3: Attached scsi generic sg6 type 0 [110264.651847] sd 15:0:0:1: [sde] 31116288 512-byte logical blocks: (15.9 GB/14.8 GiB) [110264.667049] sd 15:0:0:1: [sde] Write Protect is off [110264.667055] sd 15:0:0:1: [sde] Mode Sense: 2f 00 00 00 [110264.682767] sd 15:0:0:1: [sde] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA [110264.694975] sd 15:0:0:2: [sdf] Attached SCSI removable disk [110264.697933] sd 15:0:0:3: [sdg] Attached SCSI removable disk [110264.729918] sd 15:0:0:0: [sdd] Attached SCSI removable disk [110264.754189] sde: sde1 [110264.760114] sd 15:0:0:1: [sde] Attached SCSI removable disk [110275.377368] usb 4-1: reset SuperSpeed USB device number 3 using xhci_hcd [110275.398453] usb 4-1: Parent hub missing LPM exit latency info. Power management will be impacted. [110275.436592] xhci_hcd 0000:05:00.0: xHCI xhci_drop_endpoint called with disabled ep ffff8802e4fb9980 [110275.436600] xhci_hcd 0000:05:00.0: xHCI xhci_drop_endpoint called with disabled ep ffff8802e4fb99c0 [110277.263444] usb 4-1: USB disconnect, device number 3

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12.04 - How do I Fix Grub Error 15 on New Dual Boot Install

- by Garth

I just installed 12.04 to Dual Boot (separate partitions) with an existing Win 7. Upon reboot after install things freeze after Grub 1.5 with a Grub Error 15 message. Is there any easy way to fix this? (I am posting this from my second computer) UPDATE: I managed to boot into both 12.04 and Win7 using BIOS: Selected the disk with the Win7 'C' Partition: resulted in the same error message Rebooted, tried the disk with the Ubuntu Partitions: *Grub Menu loaded: Managed to boot 12.04, rebooted, used BIOS again: Managed to boot Win 7 So, I have access to my computer again (thru BIOS), but this has been a pretty crappy install experience. Garth I used the the Final release 12.04 Ubuntu install disk, reformatted all Linux partitions, and expected a simple clean install. Other than specifying the Ubuntu Partitions, I did a basic install of 12.04. No way I did do anything to get this crap error failure! I have no idea why my install resulted in a Grub-15 error. CLOSED - Answered my own Question: I burned a RescuTux Disk and used it to recover grub2 (simplest and easiest way for me. http://www.supergrubdisk.org/category/download/rescatuxdownloads/ Garth

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Coherence Management with EM Cloud Control 12c –demo for partners

- by JuergenKress

For access to the Oracle demo systems please visit OPN and talk to your Partner Expert We are pleased to announce the availability of the Coherence Management demo that showcases some of the key capabilities of Management Pack for Oracle Coherence and JVM Diagnostics (licensed under WLS Management Pack EE and Management Pack for NonOracle MW). This demo specifically focuses on some of the performance management and configuration management solutions for Oracle Coherence. The demo flow showcases the key enhancements made in Enterprise Manager 12c release which includes new customizable performance summary, cache data management and configuration management. Demo Highlights The demo showcases the following capabilities. Centralized monitoring for enterprise wide Coherence deployments Drill down diagnostics Customizable performance views Monitoring performance trends Monitoring Caches, Nodes, Services, etc Performance and Log Alerts Real-time Java Diagnostics and memory leak analysis Cache Data Management Lifecycle management Provisioning Coherence on a new machine Starting nodes on machine where Coherence is already running Killing a node process Demo Instructions Go to the DSS website for Oracle Partners. On the Standard Demo Launchpad page, under the “Middleware Management” section, click on the link “EM Cloud Control 12c Coherence Management” (tagged as “NEW”). Specific demo launchpad page contains a link to the detailed demo script with instructions on how to show the demo. Read more on Community Events and post your comment here. WebLogic Partner Community For regular information become a member in the WebLogic Partner Community please visit: http://www.oracle.com/partners/goto/wls-emea ( OPN account required). If you need support with your account please contact the Oracle Partner Business Center. Blog Twitter LinkedIn Mix Forum Wiki Technorati Tags: Coherence,Coherence demo,DSS,CAF,WebLogic,WebLogic Community,Oracle,OPN,Jürgen Kress

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Coherence Management with EM Cloud Control 12c –demo for partners

- by JuergenKress

For access to the Oracle demo systems please visit OPN and talk to your Partner Expert We are pleased to announce the availability of the Coherence Management demo that showcases some of the key capabilities of Management Pack for Oracle Coherence and JVM Diagnostics (licensed under WLS Management Pack EE and Management Pack for NonOracle MW). This demo specifically focuses on some of the performance management and configuration management solutions for Oracle Coherence. The demo flow showcases the key enhancements made in Enterprise Manager 12c release which includes new customizable performance summary, cache data management and configuration management. Demo Highlights The demo showcases the following capabilities. Centralized monitoring for enterprise wide Coherence deployments Drill down diagnostics Customizable performance views Monitoring performance trends Monitoring Caches, Nodes, Services, etc Performance and Log Alerts Real-time Java Diagnostics and memory leak analysis Cache Data Management Lifecycle management Provisioning Coherence on a new machine Starting nodes on machine where Coherence is already running Killing a node process Demo Instructions Go to the DSS website for Oracle Partners. On the Standard Demo Launchpad page, under the “Middleware Management” section, click on the link “EM Cloud Control 12c Coherence Management” (tagged as “NEW”). Specific demo launchpad page contains a link to the detailed demo script with instructions on how to show the demo. Read more on Community Events and post your comment here. WebLogic Partner Community For regular information become a member in the WebLogic Partner Community please visit: http://www.oracle.com/partners/goto/wls-emea ( OPN account required). If you need support with your account please contact the Oracle Partner Business Center. Blog Twitter LinkedIn Mix Forum Wiki Technorati Tags: Coherence,Coherence demo,DSS,CAF,WebLogic,WebLogic Community,Oracle,OPN,Jürgen Kress

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Cannot boot computer, help please :(

- by Austin

Ok so here is more descriptions, I REALLY NEED HELP! I installed Ubuntu on a disk (unsure of v. I can't check.. Computer is broke :/ ) I then burned the disk I restarted computer pressed f12 blah blah it came up, I pressed enter for English, I plugged an Ethernet card in for better connection, and then started the installation.... I did the basics, and I entered a host name, and a user name and pass all that, when it came to partition page, I presse enter for no and then it went back to the installation page, I pressed install again, and it brought me back, so I selected yes , it loaded an it asked what software to instal I selected sh ( it was first option and I didn't know which to do ) so after everything finished loading, my disk was ejected the process finish, I run my computer and it opens up in log in page on cmd script I didn't know it, so I ran disk again makin a user and pass to remember.... Going back to login thing I logged in, and all it did was say my username... I didn't know what to do from there, I looked online found nothing but grub stuff, so I went to "Advanced Ubuntu options" and then "(Recovery Mode) and went to update grub... In middle o loading it asked to continue (Y/n) I typed Y and it finished, it went back to the options located in (Recovery Mode) and I closed it, and it loaded... And then showed up in another script screen, saying a paragraph on top, and on left side ( where login: would be located etc. ) it says "Grub" and I don't know what to type, if I turn off computer and turn back on it just goes straight to that again... PLEASE HELP:(

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Stuck With grub rescue> console

- by rej santos

Here is the background of my issue: I just recently installed the latest version of Ubuntu along side with Windows 8 Enterprise. However upon checking the disk size, it seems that some of the portions of the hd memory were gone so I decided to check the disk partition and have seen that is was being used by another file system. Thinking that the Ubuntu takes it boots stuff from my drive C: , I deleted that partition and formated so I can use it to store some movies, music etc. Now, as I switch on my machine, I am stucked with: error: unknown filesystem grub rescue> I googled a lot and saw the following command which seems no to me like sudo, chainloader etc, all of these command only returns unknown command in the console. What I just wanted is to boot from my Windows 8 OS. Just to add, I can't open the BIOS menu so I could choose what media to boot. As I open my machine it automatically takes me to grub rescue console. Here are the thing I already have: Ubuntu Installation Disk Windows 8 System repair Disk I just don't know how to boot into these things. Let me know what to do.

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How can a usb be detected but not show up anywhere?

- by George Mauer

I started the morning by trying to create a bootable usb using a 2gb stick and the startup disk creator. It seemed to run through the whole process just fine until it got to a screen that read something like "Creating memory partion" and which sat on 100% for about 45 minutes before I hit cancel and removed the usb stick. Now the usb stick is not being detected as storage or...anything (even on my windows pc) though it does show up in the syslog. Allow me to demonstrate. We start with the usb not plugged in: [georgemauer@ubuntu:~]$ sudo fdisk -l (04-04 16:01) Disk /dev/sda: 500.1 GB, 500107862016 bytes 255 heads, 63 sectors/track, 60801 cylinders, total 976773168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x994bdc0f Device Boot Start End Blocks Id System /dev/sda1 2048 27650047 13824000 27 Hidden NTFS WinRE /dev/sda2 * 27650048 27854847 102400 7 HPFS/NTFS/exFAT /dev/sda3 27854848 976771119 474458136 7 HPFS/NTFS/exFAT I plug in the usb: [georgemauer@ubuntu:~]$ tail -f /var/log/syslog ***Snip*** Apr 4 15:01:18 ubuntu wpa_supplicant[1136]: WPA: Group rekeying completed with 00:24:36:ad:e7:3f [GTK=TKIP] Apr 4 15:02:29 wpa_supplicant[1136]: last message repeated 3 times Apr 4 15:02:29 ubuntu kernel: [22122.788133] usb 2-1: new high speed USB device number 13 using ehci_hcd Apr 4 15:02:29 ubuntu kernel: [22122.923873] scsi10 : usb-storage 2-1:1.0 Apr 4 15:02:29 ubuntu mtp-probe: checking bus 2, device 13: "/sys/devices/pci0000:00/0000:00:13.2/usb2/2-1" Apr 4 15:02:30 ubuntu mtp-probe: bus: 2, device: 13 was not an MTP device Apr 4 15:02:30 ubuntu kernel: [22123.926154] scsi 10:0:0:0: Direct-Access GENERIC USB Mass Storage 1.00 PQ: 0 ANSI: 2 Apr 4 15:02:30 ubuntu kernel: [22124.105118] sd 10:0:0:0: Attached scsi generic sg1 type 0 Apr 4 15:02:30 ubuntu kernel: [22124.108212] sd 10:0:0:0: [sdb] Attached SCSI removable disk but then: [georgemauer@ubuntu:~]$ ls /mnt -alF (04-04 16:02) total 8 drwxr-xr-x 2 root root 4096 2011-04-21 12:51 ./ drwxr-xr-x 26 root root 4096 2012-03-31 13:16 ../ [georgemauer@ubuntu:~]$ ls /media -alF (04-04 16:03) total 8 drwxr-xr-x 2 root root 4096 2012-04-04 12:18 ./ drwxr-xr-x 26 root root 4096 2012-03-31 13:16 ../ What could be going on and how do I recover my usb key?

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IOUG SIG Webcast on October 30th : Performance Tuning your DB Cloud

- by Anand Akela

The Oracle Enterprise Manager Special Interest Group (SIG) is a growing body of IOUG members who manage or are interested in all aspects of Oracle Enterprise Manager. This IOUG SIG is managed by volunteers and supported by Oracle Enterprise Manager product managers and developers. The purpose of the SIG is to bring relevant information and education through webcasts, discussions and networking to users interested in learning more about the product, and to share user experiences. On October 30th at 10 AM pacific time, Oracle Enterprise Manager SIG is hosting a webcast on "Performance Tuning your DB Cloud in OEM 12c Cloud Control - 360 Degrees". In this webcast, Tariq Farooq , CEO, BrainSurface and Mike Ault, Oracle will provide a tutorial on how to monitor and perform performance tuning of the Oracle database cloud environment. You will learn how to leverage Oracle Enterprise Manager for tuning, trouble-shooting & monitoring your Oracle Database Cloud Ecosystem. The session covers lessons learned, tips/tricks, recommendations, best practices, gotchas and a whole lot more on how to effectively use Oracle Enterprise Manager Cloud Control 12c for quick, easy & intuitive performance tuning of your Oracle Database Cloud. Session Objectives:• Leveraging OEM12c Cloud Control for Oracle DB Tuning/Monitoring • Limited Deep-Dive on AWR • Oracle DB Cloud Performance Tuning • Best Practices for DB Cloud Maintenance/Monitoring Register Now ! Stay Connected: Twitter | Face book | You Tube | Linked in | Google+ | Newsletter

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Order in which passphrase is asked for encrypted volumes

- by Lars Kotthoff

I have installed 12.10 on a machine with two disks. The root partition is on one disk, the swap partition on the other. Both disks are encrypted and I have added the corresponding entries to /etc/crypttab. During boot, it asks for the passphrase for the disk with the root filesystem. Then it continues booting and gets to the login screen before I get a chance to enter the passphrase for the other disk. After logging in, I verified that it was actually waiting for me to enter the passphrase for that second partition (askpass process is running). But at that point, I have no way of entering the passphrase anymore. The manpage for crypttab suggests that the order in which the volumes are specified matters, so I changed it to have the swap disk first. I updated the initramfs and grub afterwards, but it didn't make any difference. How can I specify the order in which the encrypted partitions are unlocked? I'm looking for a solution that either asks for the swap passphrase first or tells the system to wait until all encrypted partitions are unlocked before displaying the login screen.

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Ubuntu installer does not show drives

- by Tanweer Rashid

I am trying to install Ubuntu 12.04 LTS on my Inspiron laptio, but the installer does not show any drives. My system has a 1TB SATA drive and a 32GB SSD. As far as I can figure, the boot files are kept on the SSD for fast startup (for Windows). During Win7 installation, I had to manually load drivers for RAID controller to see all available drives. Running fdisk -l from the live CD shows the following: ubuntu@ubuntu:~$ sudo fdisk -l Disk /dev/sda: 1000.2 GB, 1000204886016 bytes 255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x234b4782 Device Boot Start End Blocks Id System /dev/sda1 63 80324 40131 de Dell Utility /dev/sda2 * 81920 41627647 20772864 7 HPFS/NTFS/exFAT /dev/sda3 41627648 357019647 157696000 7 HPFS/NTFS/exFAT /dev/sda4 357019648 1953517567 798248960 f W95 Ext'd (LBA) /dev/sda5 672415744 1312966655 320275456 7 HPFS/NTFS/exFAT /dev/sda6 1312968704 1953517567 320274432 7 HPFS/NTFS/exFAT Disk /dev/sdb: 32.0 GB, 32017047552 bytes 255 heads, 63 sectors/track, 3892 cylinders, total 62533296 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x234b474b Device Boot Start End Blocks Id System /dev/sdb1 2048 16775167 8386560 84 OS/2 hidden C: drive ubuntu@ubuntu:~$ In the Ubuntu installer, I can only choose /dev/sdb for "Device for boot loader installation", and sdb doesn't show any drives. I cannot select /dev/sda. Any ideas anyone? Thanks.

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Can't access external hard drives or thumb drives

- by calden

I am not a complete linux noob but I don't know a lot either and would greatly appreciate some help with this. I just installed Ubuntu 10.10 onto my laptop. Everything is working great however USB devices such as thumb drives and external hard drives wont show up. I have been looking around a bit and when I run sudo fdisk -l it displays this: Disk /dev/sda: 250.1 GB, 250059350016 bytes 255 heads, 63 sectors/track, 30401 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00065684 Device Boot Start End Blocks Id System /dev/sda1 * 1 29255 234983424 83 Linux /dev/sda2 29255 30402 9212929 5 Extended /dev/sda5 29255 30402 9212928 82 Linux swap / Solaris Disk /dev/sdb: 16.0 GB, 16026435072 bytes 64 heads, 32 sectors/track, 15283 cylinders Units = cylinders of 2048 * 512 = 1048576 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x000df90d Device Boot Start End Blocks Id System /dev/sdb1 * 1 15283 15649776 7 HPFS/NTFS It does seem to display my 16 gig thumb drive but other then seeing it here I cant access it to read and write files to it. It does the same with my external hard drive. I know those devices work as I have tried them on my other computer and they are working fine. Also this is what is in fstab if this will help anybody help me: proc /proc proc nodev,noexec,nosuid 0 0 /dev/sdb1 / ext4 errors=remount-ro 0 1 /dev/sdb5 none swap sw 0 0 Thank you very much for the help everyone.

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One of the partion on a usb harddisk cannot automount

- by holmescn

It is a very strange problem. My usb harddisk has four partitions, one is primary, the other three are logical (contained within an extended partition). When I plug in the disk, three of the partitions are mounted automatically except one--the first logical partition in the extended partition. Initially I thought it is the problem of system (at that time I used Mint). But after I change to Ubuntu 12.04, the problem wasn't solved. I don't want to add a rule in fstab, and I want to know what happened. The disk is fine, and the partition can be accessed in Windows and mounted manually. result of dmesg | tail: [100933.557649] usb 2-1.2: new high-speed USB device number 4 using ehci_hcd [100933.651891] scsi8 : usb-storage 2-1.2:1.0 [100934.649047] scsi 8:0:0:0: Direct-Access SAMSUNG PQ: 0 ANSI: 0 [100934.650963] sd 8:0:0:0: Attached scsi generic sg2 type 0 [100934.651342] sd 8:0:0:0: [sdb] 625142448 512-byte logical blocks: (320 GB/298 GiB) [100934.651977] sd 8:0:0:0: [sdb] Write Protect is off [100934.651989] sd 8:0:0:0: [sdb] Mode Sense: 03 00 00 00 [100934.652836] sd 8:0:0:0: [sdb] No Caching mode page present [100934.652848] sd 8:0:0:0: [sdb] Assuming drive cache: write through [100934.655354] sd 8:0:0:0: [sdb] No Caching mode page present [100934.655367] sd 8:0:0:0: [sdb] Assuming drive cache: write through [100934.734652] sdb: sdb1 sdb3 < sdb5 sdb6 sdb7 > [100934.737706] sd 8:0:0:0: [sdb] No Caching mode page present [100934.737725] sd 8:0:0:0: [sdb] Assuming drive cache: write through [100934.737731] sd 8:0:0:0: [sdb] Attached SCSI disk result of parted -l: Model: SAMSUNG (scsi) Disk /dev/sdb: 320GB Sector size (logical/physical): 512B/512B Partition Table: msdos Number Start End Size Type File system Flags 1 32.3kB 21.5GB 21.5GB primary ntfs 3 21.5GB 320GB 299GB extended lba 5 21.5GB 129GB 107GB logical ntfs 6 129GB 236GB 107GB logical ntfs 7 236GB 320GB 83.8GB logical ntfs

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How can I set up FakeRAID/SoftRAID using mdadm without losing data?

- by Danatela

There is RAID0 of 2 drives connected through Silicon Image 3132 SATA SoftRAID controller. Under Windows it was partitioned as one dynamic GPT-disk having 4 TB NTFS volume. There is a lot of music and movies on the drive. I'm trying to get him to be seen under Ubuntu as a single disk, not as 2 by 2 terabytes. I tried to read it through dmraid, had no success, it is not displayed in /dev/mapper. Also tried to configure the kernel, but did not find anything suspicious, the driver for my controller was on. There is also a driver from the manufacturer, but it is only available for RHEL and SLES. Here it's reported that SoftRAID is supported by the kernel, but apparently not completely. If I thrust drives in the AMD controller, built into the motherboard, the drive is seen as a single, but the data is lost. I know about mdadm that it is able to ditch all the information on the disks. So, is it possible to somehow create an array without actually recording information on used drives and to make the system correctly identify sections on it later? Information about the array: /dev/sdf - Disk 0 /dev/sdg - Disk 1 Array type: Stripe Block Size: 64KB Also, a device /dev/md1 is created using command mknod /dev/md1 b 9 1

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SD Card only mounted after a reboot

- by hattenn

I have a Kingston 2GB MicroSD and I plug it in via an inconix MicroSD Adapter to the internal card reader of my Samsung N210 Netbook with Ubuntu 10.10, but it doesn't show up. Only if I reboot the system when the card's plugged in it shows up. Why does it need a reboot for mounting? sudo fdisk -l gives the output below. But I can only see the drive when I reboot the computer while the card's plugged. Disk /dev/sda: 160.0 GB, 160041885696 bytes 255 heads, 63 sectors/track, 19457 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x9a5a7990 Device Boot Start End Blocks Id System /dev/sda1 1 1959 15728640 27 Unknown Partition 1 does not end on cylinder boundary. /dev/sda2 * 1959 1972 102400 7 HPFS/NTFS /dev/sda3 1972 18992 136718750 83 Linux /dev/sda4 18992 19458 3738625 5 Extended /dev/sda5 18992 19458 3738624 82 Linux swap / Solaris Disk /dev/sdb: 1973 MB, 1973420032 bytes 60 heads, 59 sectors/track, 1088 cylinders Units = cylinders of 3540 * 512 = 1812480 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Device Boot Start End Blocks Id System /dev/sdb1 1 1089 1927100+ 6 FAT16

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Feature Updates to the Windows Azure Portal

- by Clint Edmonson

Lots of activity over at the Windows Azure portal this weekend, including some exciting new features and major improvements to existing features. Here are the highlights: Support for Managing Co-administrators Set up account co-administrators to allow others to share service management duties for each Azure subscription Import/Export support for SQL Databases Export existing SQL Azure databases to blob storage using SQL Server 2012’s BACPAC format. Create a new SQL Azure database from an existing BACPAC stored in blob storage Storage Container Management and Access Control Create blob storage containers directly within the portal Edit their public/private access settings Drill into storage containers and see the blobs contained within them Improved Cloud Service Status Notifications Detailed health status information about cloud services and roles as they transition between states Virtual Machine Experience Enhancements Option to automatically delete corresponding VHD files from blob storage when deleting VM disks Service Bus Management and Monitoring Ability to create and manage service bus Namespaces, Queues, Topics, Relays and Subscriptions Rich monitoring of Topics, Queues, and Subscriptions with detailed and customizable dashboard metrics Entity status (Topic, Queue, or Subscription) can be changed interactively via dashboard Direct links to the Access Control Services (ACS) namespaces when working with service bus access keys Media Services Monitoring Support Monitor encoding jobs that are queued for processing as well as active, failed and queued tasks for encoding jobs The above features are all now live in production and available to use immediately. If you don’t already have a Windows Azure account, you can sign-up for a free trial and start using them today. Stay tuned to my twitter feed for Windows Azure announcements, updates, and links: @clinted Reference ID: P7VVJCM38V8R

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It could be worse....

- by Darryl Gove

As "guest" pointed out, in my file I/O test I didn't open the file with O_SYNC, so in fact the time was spent in OS code rather than in disk I/O. It's a straightforward change to add O_SYNC to the open() call, but it's also useful to reduce the iteration count - since the cost per write is much higher: ... #define SIZE 1024 void test_write() { starttime(); int file = open("./test.dat",O_WRONLY|O_CREAT|O_SYNC,S_IWGRP|S_IWOTH|S_IWUSR); ... Running this gave the following results: Time per iteration 0.000065606310 MB/s Time per iteration 2.709711563906 MB/s Time per iteration 0.178590114758 MB/s Yup, disk I/O is way slower than the original I/O calls. However, it's not a very fair comparison since disks get written in large blocks of data and we're deliberately sending a single byte. A fairer result would be to look at the I/O operations per second; which is about 65 - pretty much what I'd expect for this system. It's also interesting to examine at the profiles for the two cases. When the write() was trapping into the OS the profile indicated that all the time was being spent in system. When the data was being written to disk, the time got attributed to sleep. This gives us an indication how to interpret profiles from apps doing I/O. It's the sleep time that indicates disk activity.

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Install on Acer Aspire 4752

- by user216962

I am at my wits end with this computer. I bought and Acer Aspire 4752 with a fully loaded version of Windows 7 on it. I prefer Ubuntu so I began to install 14.04 from USB. Got the error: [Errno 5] Input/output error This is often due to a faulty CD/DVD disk or drive, or a faulty hard disk. It may help to clean the CD/DVD, to burn the CD/DVD at a lower speed, to clean the CD/DVD drive lens (cleaning kits are often available from electronics suppliers), to check whether the hard disk is old and in need of replacement, or to move the system to a cooler environment. So I tried a different USB stick, same error. Tried different versions of Ubuntu, got the same error. I've used startup disk creator and Unetbootin to make start USB boot devices. I can boot with the USB drive and run Ubuntu that way. I even checked the hard drive using the tools in Ubuntu. Everything was fine, except it said the hard drive was hot. I tried a different hard drive. Got same error above. I ran a test with mem86, everything was fine. No matter what I do, using the USB gives me the Errno5 error. I then switched to using DVDs. Now I keep getting an uncompression error when installing Ubuntu 14.04 or 12.04. I can't figure out for the life of me why I get nothing but errors. Can anyone help?

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Help with dual booting Windows 8.1 Professional and Ubuntu 13.10

- by user1292548

I recently installed a clean version of Windows 8.1 Professional on my Lenovo Y500 (with Samsung 256GB 840 Pro SSD). I have Windows all set up and running normally. I am trying to dual boot Windows 8.1 and Ubuntu 13.10, but the installation procedure don't allow me to either "Install alongside..." or shows my SSD partitions correctly when I chose the "Something Else" option. I have created a 25GB partition of free space in the Windows disk manager, but on the installation screen on Ubuntu, it shows the whole drive as a free space. I have tried installing with a burned .ISO disk and a bootable USB, the results are the same for both. Windows Disk Management screen: http://imageshack.us/a/img855/9504/59zu.jpg The Ubuntu installation screen: http://imageshack.us/a/img62/2712/9g6i.jpg I've ran into this problem before when trying to dual boot Ubuntu and Windows 7 Professional a month ago. But I gave up and never resolved the issue. --EDIT-- I tried what Eero Aaltonen suggested, and this is my result: ubuntu@ubuntu:~$ sudo parted /dev/sda print Warning: /dev/sda contains GPT signatures, indicating that it has a GPT table. However, it does not have a valid fake msdos partition table, as it should. Perhaps it was corrupted -- possibly by a program that doesn't understand GPT partition tables. Or perhaps you deleted the GPT table, and are now using an msdos partition table. Is this a GPT partition table? Yes/No? yes Model: ATA Samsung SSD 840 (scsi) Disk /dev/sda: 256GB Sector size (logical/physical): 512B/512B Partition Table: gpt Number Start End Size File system Name Flags ubuntu@ubuntu:~$

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Dual Boot menu with Ubuntu and Windows 8 not showing up

- by user180630

I know a lot of posts have been written, and I had read most of them when I encountered the problem. None of them solved the problem. I have successfully installed Ubuntu 12.04 on top of Windows 8. Now my PC simply boots into Windows 8. If I press 'Esc' at start of BIOS, and then F9,the GRUB shows up and Ubuntu is listed at the top of the several options to boot from. I did run Boot-Repair once I logged into Ubuntu explicitly from GRUB as mentioned above. I did all said by Stormvirux in this link but was still unsuccessful. The debug info is listed here. Something which confuses me is the message which Boot-Repair stated after it did its job. You can now reboot your computer. Please do not forget to make your BIOS boot on sda (8004MB) disk! The boot files of [The OS now in use - Ubuntu 12.04.2 LTS] are far from the start of the disk. Your BIOS may not detect them. You may want to retry after creating a /boot partition (EXT4, 200MB, start of the disk). This can be performed via tools such as gParted. Then select this partition via the [Separate /boot partition:] option of [Boot Repair]. (https://help.ubuntu.com/community/BootPartition) I don't know why it says it is far from the start of the disk as I see it first in the GRUB menu which comes up at startup. One more input, when I try to place the GRUB in sda, Boot-Repair does not progress giving me the following error: GPT detected. Please create a BIOS-Boot partition (>1MB, unformatted filesystem, bios_grub flag). This can be performed via tools such as Gparted. Then try again. Alternatively, you can retry after activating the [Separate /boot/efi partition:] option. I had to select Separate /boot/efi partition: sdb2

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SD Card only mounted after a reboot

- by evothur

Hi everyone. I have a Kingston 2GB MicroSD and I plug it in via an inconix MicroSD Adapter to the internal card reader of my Samsung N210 Netbook with Ubuntu 10.10, but it doesn't show up. Only if I reboot the system when the card's plugged in it shows up. Why does it need a reboot for mounting? sudo fdisk -l gives the output below. But I can only see the drive when I reboot the computer while the card's plugged. Disk /dev/sda: 160.0 GB, 160041885696 bytes 255 heads, 63 sectors/track, 19457 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x9a5a7990 Device Boot Start End Blocks Id System /dev/sda1 1 1959 15728640 27 Unknown Partition 1 does not end on cylinder boundary. /dev/sda2 * 1959 1972 102400 7 HPFS/NTFS /dev/sda3 1972 18992 136718750 83 Linux /dev/sda4 18992 19458 3738625 5 Extended /dev/sda5 18992 19458 3738624 82 Linux swap / Solaris Disk /dev/sdb: 1973 MB, 1973420032 bytes 60 heads, 59 sectors/track, 1088 cylinders Units = cylinders of 3540 * 512 = 1812480 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Device Boot Start End Blocks Id System /dev/sdb1 1 1089 1927100+ 6 FAT16

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ubuntu 12.04 installer does not recognize drive partitions

- by endless forms

I recently purchased a new HP Pavilion HPE desktop running Windows 7. I am trying to install a dual-boot system with 12.04. However, when I run the LiveCD I only get as far as the "Install" window where you can select the partitions for your drives. On the bottom where it says "device for boot loader installation" I have "/dev/sda" and cannot select any other devices. All the options to change the drives are greyed out, most likely because there are no drives in the window. I partitioned my largest drive using the tools within Windows, then booted into the CD, but nothing shows up. I then used Gparted to change the new space from unallocated to an /ext2, and still nothing shows up. The installer does not recognize anything, but when I go into an Ubuntu session and use the disk utility manager I can see the partitions I made. Anything I do has to be done outside of the installer. I have no files on this new computer, so this is the perfect time to install a parallel OS. I would like avoid completely reinstalling Windows, however. I've been over the forums many times, but all the answers I've found have not worked for me. I also tried flagging the new, empty partition as boot, but that screwed Windows up. Also, the WUBI installer hits the same point and quits. I know that the disk itself is fine because I just made another dual boot system on a Gateway PC. This makes me think something within this computer is preventing the installer from "seeing" the drives. Any help would be much appreciated! Edit in response: The main part of the partitioning window shows no partitions, everything is blank. There is no way to add partitions, and all the buttons are useless. I've tried defragging my drive multiple times, and I also used the same disk to dual-boot another PC with no problems, so it's not the disk, it's definitely the computer.

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Drive reporting incorrect free space

- by Oli

So I swapped my shiny SATA SSD for an even shinier PCI-E SSD. I run my core OS on the SSD because it's silly-fast. I did this on my old SSD so I created a new EXT4 partition and then just dded the data across (sorry I don't know the exact command I ran anymore) and after reinstalling grub, I booted onto the PCI-E SSD. At first glance everything had worked perfectly and things were running faster than ever. But then I noticed the free disk space on the new, larger drive: it was almost exactly the same as it was on the other disk... A disk that was half its size. So it looks as if I've copied the files across incorrectly and it's copied some of the filesystem metadata along with it. Tools like du and Disk Usage Analyzer come back with the correct figures. Things that look at the partition (and not the files) seem to think the drive is 120GB I've been using this drive for a week now so it's way out of sync with the old SSD so dumping the data and starting again isn't a job that fills me with joy but two questions: Is there a way to fix my filesystem so it knows what it's really on about? fsck e2fsck and badblocks all seem to be able to scan it without finding a problem with it. If I do plug my old SSD back in, copy the data off my PCI-E on to it and then copy it back onto a fresh filesystem (eg juggle the data around), what's the best way of doing that? I obviously want to keep all the permissions and softlinks where they are.

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ubuntu boots only with usb

- by klimat

Just installed Ubuntu 11.04. But it boots only from usb. Seems like I didn't pay attention during selecting boot device. sudo fdisk -l [sudo] password for klim: Disk /dev/sda: 500.1 GB, 500107862016 bytes 255 heads, 63 sectors/track, 60801 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk identifier: 0x000177e1 Device Boot Start End Blocks Id System /dev/sda1 1 60045 482302976 83 Linux /dev/sda2 60045 60802 6080513 5 Extended Partition 2 does not start on physical sector boundary. /dev/sda5 60045 60802 6080512 82 Linux swap / Solaris Disk /dev/sdb: 4004 MB, 4004511744 bytes 124 heads, 62 sectors/track, 1017 cylinders Units = cylinders of 7688 * 512 = 3936256 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x000eee1a Device Boot Start End Blocks Id System /dev/sdb1 * 1 1017 3909317 b W95 FAT32 grub updating or another "grub" operations don't work as I've tried. Can I just copy whole boot folder from usb to HD or smth like that? Any kind of help is appreciated. Apologize for my newbie skills.

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My new hard drive won't automount on boot

- by user518

I installed a new hard drive right before installing the new Ubuntu 11.10 by reformatting, not upgrading. I was able to mount my drive, and partition it. It's a 1TB, and I was able to transfer all of my music, and videos to it. For some reason, it won't mount on boot, and I can't figure out how to manually mount it afterwards either. Here's my current /etc/fstab: # /etc/fstab: static file system information. # # Use 'blkid' to print the universally unique identifier for a # device; this may be used with UUID= as a more robust way to name devices # that works even if disks are added and removed. See fstab(5). # # proc /proc proc nodev,noexec,nosuid 0 0 # / was on /dev/sda1 during installation UUID=e0fbdf09-f9a0-4336-bac3-ba4dc6cfbcc0 / ext4 errors=remount-ro,user_xattr 0 1 # swap was on /dev/sda5 during installation UUID=adf15180-c84c-4309-bc9f-085fd7464f89 none swap sw 0 0 /dev/sdc1 /media/sdc1 ext4 defaults 0 0 The last line is what I added for my hard drive. Here's the output from sudo lshw -C disk: % sudo lshw -C disk ~ *-disk:0 description: ATA Disk product: ST3250310AS vendor: Seagate physical id: 0 bus info: scsi@2:0.0.0 logical name: /dev/sda version: 3.AD serial: 6RYBF2QE size: 232GiB (250GB) capabilities: partitioned partitioned:dos configuration: ansiversion=5 signature=000da204 *-cdrom description: DVD-RAM writer product: DVD+-RW DH-16A6S vendor: PLDS physical id: 0.0.0 bus info: scsi@4:0.0.0 logical name: /dev/cdrom logical name: /dev/cdrw logical name: /dev/dvd logical name: /dev/dvdrw logical name: /dev/scd0 logical name: /dev/sr0 version: YD11 capabilities: removable audio cd-r cd-rw dvd dvd-r dvd-ram configuration: ansiversion=5 status=nodisc

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