Everyone,
I recently added a 300gig Seagate sata drive on a Centos 5.0 and have a couple of questions.
The drive was recognized with the device as /dev/sdc. The system came with some SCCI drives that are labeled as /dev/sda and /dev/sdb. I was surprised that the sata drives used sdc. Are the sata drives considered more like SCCI or IDE drives?
The real problem occurred when I tried to partition the drive with parted. I used he command mkpart to form one partition of 300 gigs which created /dev/sdc1, and then after 'quiting' parted used mkfs.ext3 to create a file system. Everything went as expected with the ability to mount the file system and copy files into it. However, /dev/sdc1 disappeared when I rebooted. After the reboot /dev/sdc1 was missing and CentOs obviously could not recognize the partition. The error is probably related to my lack of experience with parted so I tried it 2 other times with the same results.
I finally gave up and used fdisk which has worked without a problem.
By way of observation I could not find a 'write to disk' command in parted like what is present in fdisk. Is there a problem with parted or I am just lacking in knowledge of some of the parted commands. Certainly could not find any write like statements in the man pages or the info pages.
Are there others of you that use parted? What did I do wrong?
Greg Ennis
On 9/25/07, Gregory P. Ennis PoMec@pomec.net wrote:
Everyone,
I recently added a 300gig Seagate sata drive on a Centos 5.0 and have a couple of questions.
The drive was recognized with the device as /dev/sdc. The system came with some SCCI drives that are labeled as /dev/sda and /dev/sdb. I was surprised that the sata drives used sdc. Are the sata drives considered more like SCCI or IDE drives?
Yes ATA drive look more like SCSI than old IDE
The real problem occurred when I tried to partition the drive with parted. I used he command mkpart to form one partition of 300 gigs which created /dev/sdc1, and then after 'quiting' parted used mkfs.ext3 to create a file system. Everything went as expected with the ability to mount the file system and copy files into it. However, /dev/sdc1 disappeared when I rebooted. After the reboot /dev/sdc1 was missing and CentOs obviously could not recognize the partition. The error is probably related to my lack of experience with parted so I tried it 2 other times with the same results.
I finally gave up and used fdisk which has worked without a problem.
By way of observation I could not find a 'write to disk' command in parted like what is present in fdisk. Is there a problem with parted or I am just lacking in knowledge of some of the parted commands. Certainly could not find any write like statements in the man pages or the info pages.
Are there others of you that use parted? What did I do wrong?
I dont see anything wrong. maybe sync will help the OS to write the new partition on the disk. # sync
also You could use partprob to reread partition from disk and verify chnages are flushed on disk.
Regards
Greg Ennis
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
On Tue, 2007-09-25 at 15:02 +0200, Alain Spineux wrote:
On 9/25/07, Gregory P. Ennis PoMec@pomec.net wrote:
Everyone,
I recently added a 300gig Seagate sata drive on a Centos 5.0 and have a couple of questions.
The drive was recognized with the device as /dev/sdc. The system came with some SCCI drives that are labeled as /dev/sda and /dev/sdb. I was surprised that the sata drives used sdc. Are the sata drives considered more like SCCI or IDE drives?
Yes ATA drive look more like SCSI than old IDE
The real problem occurred when I tried to partition the drive with parted. I used he command mkpart to form one partition of 300 gigs which created /dev/sdc1, and then after 'quiting' parted used mkfs.ext3 to create a file system. Everything went as expected with the ability to mount the file system and copy files into it. However, /dev/sdc1 disappeared when I rebooted. After the reboot /dev/sdc1 was missing and CentOs obviously could not recognize the partition. The error is probably related to my lack of experience with parted so I tried it 2 other times with the same results.
I finally gave up and used fdisk which has worked without a problem.
By way of observation I could not find a 'write to disk' command in parted like what is present in fdisk. Is there a problem with parted or I am just lacking in knowledge of some of the parted commands. Certainly could not find any write like statements in the man pages or the info pages.
Are there others of you that use parted? What did I do wrong?
I dont see anything wrong. maybe sync will help the OS to write the new partition on the disk. # sync
also You could use partprob to reread partition from disk and verify chnages are flushed on disk.
Good thoughts !!! I had no knowledge of 'sync'.... sounds like a real possibility, but I am surprised that parted would need sync.
on 9/24/2007 3:42 PM Gregory P. Ennis spake the following:
Everyone,
I recently added a 300gig Seagate sata drive on a Centos 5.0 and have a couple of questions.
The drive was recognized with the device as /dev/sdc. The system came with some SCCI drives that are labeled as /dev/sda and /dev/sdb. I was surprised that the sata drives used sdc. Are the sata drives considered more like SCCI or IDE drives?
The real problem occurred when I tried to partition the drive with parted. I used he command mkpart to form one partition of 300 gigs which created /dev/sdc1, and then after 'quiting' parted used mkfs.ext3 to create a file system. Everything went as expected with the ability to mount the file system and copy files into it. However, /dev/sdc1 disappeared when I rebooted. After the reboot /dev/sdc1 was missing and CentOs obviously could not recognize the partition. The error is probably related to my lack of experience with parted so I tried it 2 other times with the same results.
I finally gave up and used fdisk which has worked without a problem.
By way of observation I could not find a 'write to disk' command in parted like what is present in fdisk. Is there a problem with parted or I am just lacking in knowledge of some of the parted commands. Certainly could not find any write like statements in the man pages or the info pages.
Are there others of you that use parted? What did I do wrong?
Greg Ennis
Do you remember what command you used to create the partition? Should be something like mkpart primary ext2
On Tue, 2007-09-25 at 09:12 -0700, Scott Silva wrote:
on 9/24/2007 3:42 PM Gregory P. Ennis spake the following:
Everyone,
I recently added a 300gig Seagate sata drive on a Centos 5.0 and have a couple of questions.
The drive was recognized with the device as /dev/sdc. The system came with some SCCI drives that are labeled as /dev/sda and /dev/sdb. I was surprised that the sata drives used sdc. Are the sata drives considered more like SCCI or IDE drives?
The real problem occurred when I tried to partition the drive with parted. I used he command mkpart to form one partition of 300 gigs which created /dev/sdc1, and then after 'quiting' parted used mkfs.ext3 to create a file system. Everything went as expected with the ability to mount the file system and copy files into it. However, /dev/sdc1 disappeared when I rebooted. After the reboot /dev/sdc1 was missing and CentOs obviously could not recognize the partition. The error is probably related to my lack of experience with parted so I tried it 2 other times with the same results.
I finally gave up and used fdisk which has worked without a problem.
By way of observation I could not find a 'write to disk' command in parted like what is present in fdisk. Is there a problem with parted or I am just lacking in knowledge of some of the parted commands. Certainly could not find any write like statements in the man pages or the info pages.
Are there others of you that use parted? What did I do wrong?
Greg Ennis
Do you remember what command you used to create the partition? Should be something like mkpart primary ext2
after entering parted in interactive mode I gave the command "mkpart" this was followed other questions :
(parted) mkpart Partition type? primary/extended? primary File system type? [ext2]? Start? 0 End? 300G
When this is done /dev/sdc1 was created; it was mountable; and I could copy files to it. However when I rebooted /dev/sdc1 was absent and of course nothing was mountable.
Greg
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Alain Spineux -
Gregory P. Ennis -
Scott Silva