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 majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
