Re: identifying failed disk/s in an array.
Tomasz Chmielewski wrote: Michael Harris schrieb: i have a disk fail say HDC for example, i wont know which disk HDC is as it could be any of the 5 disks in the PC. Is there anyway to make it easier to identify which disk is which?. If the drives have any LEDs, the most reliable way would be: dd if=/dev/drive of=/dev/null Then look which LED is the one which blinks the most. And/or use smartctl to look up the make/model/serial number and look at the drive label. I always do this to make sure I'm pulling the right drive (also useful to RMA the drive) David - To unsubscribe from this list: send the line unsubscribe linux-raid in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: identifying failed disk/s in an array.
In message [EMAIL PROTECTED] you wrote: And/or use smartctl to look up the make/model/serial number and look at the drive label. I always do this to make sure I'm pulling the right drive (also useful to RMA the drive) Or, probblay even faster, do a ls -l /dev/disk/by-id (assuming you are using udev). Best regards, Wolfgang Denk -- DENX Software Engineering GmbH, MD: Wolfgang Denk Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: [EMAIL PROTECTED] Command, n.: Statement presented by a human and accepted by a computer in such a manner as to make the human feel as if he is in control. - To unsubscribe from this list: send the line unsubscribe linux-raid in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: identifying failed disk/s in an array.
- Message from [EMAIL PROTECTED] - Date: Wed, 23 Jan 2008 16:05:40 +1100 From: Michael Harris [EMAIL PROTECTED] Reply-To: Michael Harris [EMAIL PROTECTED] Subject: identifying failed disk/s in an array. To: linux-raid@vger.kernel.org Hi, I have just built a Raid 5 array using mdadm and while it is running fine I have a question, about identifying the order of disks in the array. In the pre sata days you would connect your drives as follows: Primary Master - HDA Primary Slave - HDB Secondary - Master - HDC Secondary - Slave -HDD So if disk HDC failed i would know it was the primary disk on the secondary controller and would replace that drive. My current setup is as follows MB Primary Master (PATA) Primary Master - Operating System The array disks are attached to: MB Sata port 1 MB Sata port 2 PCI card Sata port 1 When i setup the array the OS drive was SDA and the other SDB,SDC,SDD. Now the problem is everytime i reboot, the drives are sometimes detected in a different order, now because i mount root via the UUID of the OS disk and the kernel looks at the superblocks of the raided drives everything comes up fine, but I'm worried that if i move the array to another machine and need to do a mdadm --assemble that i won't know the correct order of the disks and what is more worrying if i have a disk fail say HDC for example, i wont know which disk HDC is as it could be any of the 5 disks in the PC. Is there anyway to make it easier to identify which disk is which?. - End message from [EMAIL PROTECTED] - Try this: mdadm -Q --detail /dev/md0 to see which disk is which disk in the raid. To identify a disk you can examine it using: mdadm -E /dev/sd[b-d] and read your dmesg. And finally you can use blkid to associate UUIDs with devices. I hope this helps. Kind regards, Alex. #_ __ _ __ http://www.nagilum.org/ \n icq://69646724 # # / |/ /__ _(_) /_ _ [EMAIL PROTECTED] \n +491776461165 # # // _ `/ _ `/ / / // / ' \ Amiga (68k/PPC): AOS/NetBSD/Linux # # /_/|_/\_,_/\_, /_/_/\_,_/_/_/_/ Mac (PPC): MacOS-X / NetBSD /Linux # # /___/ x86: FreeBSD/Linux/Solaris/Win2k ARM9: EPOC EV6 # cakebox.homeunix.net - all the machine one needs.. - To unsubscribe from this list: send the line unsubscribe linux-raid in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
identifying failed disk/s in an array.
Hi, I have just built a Raid 5 array using mdadm and while it is running fine I have a question, about identifying the order of disks in the array. In the pre sata days you would connect your drives as follows: Primary Master - HDA Primary Slave - HDB Secondary - Master - HDC Secondary - Slave -HDD So if disk HDC failed i would know it was the primary disk on the secondary controller and would replace that drive. My current setup is as follows MB Primary Master (PATA) Primary Master - Operating System The array disks are attached to: MB Sata port 1 MB Sata port 2 PCI card Sata port 1 When i setup the array the OS drive was SDA and the other SDB,SDC,SDD. Now the problem is everytime i reboot, the drives are sometimes detected in a different order, now because i mount root via the UUID of the OS disk and the kernel looks at the superblocks of the raided drives everything comes up fine, but I'm worried that if i move the array to another machine and need to do a mdadm --assemble that i won't know the correct order of the disks and what is more worrying if i have a disk fail say HDC for example, i wont know which disk HDC is as it could be any of the 5 disks in the PC. Is there anyway to make it easier to identify which disk is which?. thanks Mike - To unsubscribe from this list: send the line unsubscribe linux-raid in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: identifying failed disk/s in an array.
Michael Harris schrieb: Hi, I have just built a Raid 5 array using mdadm and while it is running fine I have a question, about identifying the order of disks in the array. In the pre sata days you would connect your drives as follows: Primary Master - HDA Primary Slave - HDB Secondary - Master - HDC Secondary - Slave -HDD So if disk HDC failed i would know it was the primary disk on the secondary controller and would replace that drive. My current setup is as follows MB Primary Master (PATA) Primary Master - Operating System The array disks are attached to: MB Sata port 1 MB Sata port 2 PCI card Sata port 1 When i setup the array the OS drive was SDA and the other SDB,SDC,SDD. Now the problem is everytime i reboot, the drives are sometimes detected in a different order, now because i mount root via the UUID of the OS disk and the kernel looks at the superblocks of the raided drives everything comes up fine, but I'm worried that if i move the array to another machine and need to do a mdadm --assemble that i won't know the correct order of the disks and what is more worrying if i have a disk fail say HDC for example, i wont know which disk HDC is as it could be any of the 5 disks in the PC. Is there anyway to make it easier to identify which disk is which?. If the drives have any LEDs, the most reliable way would be: dd if=/dev/drive of=/dev/null Then look which LED is the one which blinks the most. -- Tomasz Chmielewski http://wpkg.org - To unsubscribe from this list: send the line unsubscribe linux-raid in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
