search for: sdxx

Hello everybody, I am new to this list, so welcome everybody. Last 2 week I had two harddisk crashes with my ext2 file system. This is what sort of happed with both of the disk: I pluged in my USB to SATA converter in my harddisk that has an ext2 filesystem. I mounted the partition, went to a directory that had a DVD image. I mounted the dvd image in the same directory and started watching the

RHEL 4 (CENT OS) Am I waisting my time trying to get the 10G Clusterware installer to use OCFS2 volumes for the voting and OCR disks ? The ocfs2 setup seems happy on both nodes but the 10G installer says the location entered for the oracle cluster registry (OCR) is not shared across all the nodes in the cluster Do the volumes need to mounted ? I did with no change . [root@green rc5.d]#

We have CENTOS 4.X and 5.X on DELL servers. Recently we found some bad blocks happen on databases. the way we create file system is: mke2fs -j /dev/sdXX Does there has any good way can create file system with less bad block or avoid file system to use bad block? Thanks. ______________________________________________________________________________________________________ ?????????Yahoo!??????2.0????????????? http://tw.mg0.mail.yahoo.com/d...

...o you don't "inherit" any > badness ("dd if=/dev/zero of=/dev/sdx bs=512 count=1 conv=sync"). > Actually before destroying the partition table, I'd zero out the > beginning of all and any partitions ("dd if=/dev/zero bs=1024k > count=10 conv=sync of=/dev/sdxX" x Y) first, as we are in starting > from scratch mode. (If there were RAID/GPT involved I'd zero out > the end of partitions/disk respectively too.) . CPU reading a memory location is not like human reading from paper. <zero> bytes are no more "nothing" than any of t...

...mount.ntfs-3g) of a usb external disk. So I can access from my lan to this usb disk. [usb0] path=/media/usb0 writable = yes browseable = no valid users = nick [...] when I finish to use this disk and I try to umount it samba doesn't release this the disk: umount /media/usb0 (or umount /dev/sdXX) umount: /media/usb0: device is busy because --> lsof|grep usb0 smbd 29491 root cwd DIR 180,1 102400 5 /media/usb0 if anybody uses this remote share how I should umount the disk? Thanks! Pol

Hi all If we loose a drive in a raid 10 array (mdadm software raid) what are the steps needed to correctly do the following: - identify which physical drive it is - replace the drive - add the new drive to the array and force it to re-sync Thanks in advance

hello, quick question about extlinux: I accidentally installed extlinux on the wrong partition (I run extlinux -i somewhere beofre mounting my usb key to somewhere). Now extlinux seems to be stuck in my main hd partition... how do I remove extlinux from the hard drive? I mean both the extlinux.sys file and the bits in the partition table... Could not find any info how to doit. Thanks. Paolo

Hi, I need to securely wipe out a disk on a remote machine, but I don't have access to that machine. Therefore I cannot use the LiveCD+shred (or dd) combination. Besides manually shreding known data files, I am wondering if there is a (free) tool that can be used in my case. Thanks.

What steps do I need to take to change a host's name? I modified the /etc/ocfs.conf file but ocfstool still reports the old name under the "Configured Nodes" tab. I'm also wondering where ocfstool stores the partition information that it shows under the device list. I dumped a couple ocfs partitions but they still show up in ocfstool. Thanks, Don

...tition table first so you don't "inherit" any badness ("dd if=/dev/zero of=/dev/sdx bs=512 count=1 conv=sync"). Actually before destroying the partition table, I'd zero out the beginning of all and any partitions ("dd if=/dev/zero bs=1024k count=10 conv=sync of=/dev/sdxX" x Y) first, as we are in starting from scratch mode. (If there were RAID/GPT involved I'd zero out the end of partitions/disk respectively too.) Further making starting first partition start on sector 2048 or 63 or whatever new USB sticks have (I've seen really weird starting sector...

...marker for filesystems that might need this feature; but the question is what should a good default be?) So what I'm looking for from testers is to run the following experiment: 1) Using your existing e2fsck (please let me know which version), run the command: /sbin/e2fsck -nfvttC0 /dev/sdXX ... and send me the output. Since the e2fsck is run with the -n option, it is ok to run this on a mounted filesystem (but you probably want to do this at night or some lightly loaded time since it will slow your fileserver down esp. if you try this during peak hours). If you kn...

Hey all, Ok, so I've been having some trouble for a while with an EC2 instance running CentOS 5.11 with a disk volume reporting 100% usage. Root is on an EBS volume. So I've tried the whole 'du -sk | sort -nr | head -10' routine all around this volume getting rid of files. At first I was getting rid of about 50MB of files. Yet the volume remains at 100% capacity. Thinking

thanks for the reply, Phil It would, were udev not inserting USB and/or eSATA drives at /dev/sdb1 and/or /dev/sdc1 and exposing the array to the udev rule intended to handle only removable devices (at sdc or sdd). The array then mounts unpredictably in /media/xxx-sdc1 or sdd1 - not what is wanted - depend on how many removable devices are plugged at the time of rebooting. Of course, a single

...to get more precise and consistent values. also note, Unix (and Linux) file systems usually have a reserved freespace, only root can write that last bit. most modern file systems suffer from severe fragmentation if you completely fill them. ext*fs, you adjust this with `tune2fs -m 1 /dev/sdXX`. XFS treats these reserved blocks as inviolable, so they don't show up as freespace, they can be changed with xfs_io but should be modified at your own risk. -- john r pierce 37N 122W somewhere on the middle of the left coast

hi all, after i upgraded a physical server (SUN FIRE X4170) from CentOS 6.8 to 7.2 i am not able to get the same iSCSI read performance. the server is connected to HP P2000 Storage via 2 x 1GbE Ethernet. CentOS 6.8 gives me full read performance on raw iSCSI devices /dev/sdxx at 115MB/s. CentOS 7.2 allows only 90-100MB/s, read performance varies and is not stable like for 6.8 the multipath performance on 7.2 is even worse. CentOS 6.8 allows to read a full speed and stable 220MB/s. CentOS 7.2 maximum was 140MB/s after i disabled readahead for multipath devices in tuned...

...s-image +[options] \fIsource\fP \fItarget\fP +.SH DESCRIPTION +.B btrfs-image +is used to create an image of a btrfs filesystem. All data will be zeroed, +but metadata and the like is preserved. +.I source +is the special file corresponding to the device containing a btrfs filesystem. +(e.g \fI/dev/sdXX\fP). +.I target +is the image file that btrfs-image creates. When used with \fB-r\fP option, +\fBbtrfs-image\fP restores the image file from source into target. +.SH OPTIONS +.TP +\fB\-r\fP +restore metadump image. +.TP +\fB\-c\fR \fIvalue\fP +compression level (0 ~ 9). +.TP +\fB\-t\fR \fIvalue\fP...

Hi, I've got a Redhat 7.2 system: Celeron 400 512MB RAM 18GB SCSI HD (/boot (ext2fs), / (ext3fs)) 40GB IDE HD (/ (ext3fs)) I run a bunch of services on the box (apache + mod_perl, MYSQL, Samba, etc) but the system is not under heavy load. This system has performance issues reading/writing to the ext3fs filesystems. The performance issues cropped up when I installed Redhat 7.2. Previously

I tried to create some swap files in /dev directory for my desktop. the dd and mkswap were ok. but when I try to swapon it, i get this: # swapon /dev/myswap swapon: /dev/myswap: Invalid argument but when I mv the file to some other directory like /mnt or /, the swapon works. could sb. tell me why? -- Tang Jianwei

...uriously enough, stat() syscall on C:\$Extend\$UsnJrnl seems to work and returns the correct inode number. Yet the size is wrong as it reports 0 while the real one is > 9Mb. The next step I tried was to use ntfscat command in the following manner: ntfscat -i <UsnJrnl inode number> /dev/sdXX and it worked flawlessly. So I proceeded adding such API to libguestfs and I could extract the journal without any issue. The UsnJrnl file is very handy to check what changes were made on disk. Not only it's faster than using virt-diff on two different snapshots but it also shows much more...

...consistent values. > > > also note, Unix (and Linux) file systems usually have a reserved > freespace, only root can write that last bit. most modern file systems > suffer from severe fragmentation if you completely fill them. ext*fs, you > adjust this with `tune2fs -m 1 /dev/sdXX`. XFS treats these reserved blocks > as inviolable, so they don't show up as freespace, they can be changed with > xfs_io but should be modified at your own risk. > > > > > > -- > john r pierce 37N 122W > somewhere on the middle...