Hi, I am finally replacing an old and now failed drive with a new one. I normally create a partition the size of the entire disk and add that but whilst checking the sizes marry up i noticed that is an odity... Below is an fdisk dump of all the drives in my RAID6 array sdc--- /dev/sdc1 2048 1953525167 976761560 fd Linux raid autodetect --- Seems to be different to sda say which is also '1TB' sda--- /dev/sda1 63 1953520064 976760001 fd Linux raid autodetect --- Now i read somewhere that the sizes flucuate but as some core value remains the same can anyone confirm if this is the case? I am reluctant to add to my array until i know for sure... 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: 0xabb7ea39 Device Boot Start End Blocks Id System /dev/sda1 63 1953520064 976760001 fd Linux raid autodetect Disk /dev/sdb: 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: 0x00000000 Device Boot Start End Blocks Id System /dev/sdb1 63 976768064 488384001 fd Linux raid autodetect Disk /dev/sdc: 1000.2 GB, 1000204886016 bytes 81 heads, 63 sectors/track, 382818 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: 0xc7314361 Device Boot Start End Blocks Id System /dev/sdc1 2048 1953525167 976761560 fd Linux raid autodetect Disk /dev/sdd: 750.2 GB, 750156374016 bytes 255 heads, 63 sectors/track, 91201 cylinders, total 1465149168 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: 0x00000000 Device Boot Start End Blocks Id System /dev/sdd1 63 1465144064 732572001 fd Linux raid autodetect Disk /dev/sde: 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: 0x00000000 Device Boot Start End Blocks Id System /dev/sde1 63 1953520064 976760001 fd Linux raid autodetect Disk /dev/sdf: 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: 0x4d291cc0 Device Boot Start End Blocks Id System /dev/sdf1 63 1953520064 976760001 fd Linux raid autodetect Disk /dev/sdg: 750.2 GB, 750156374016 bytes 255 heads, 63 sectors/track, 91201 cylinders, total 1465149168 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: 0x00000000 Device Boot Start End Blocks Id System /dev/sdg1 63 1465144064 732572001 fd Linux raid autodetect ----------------------- N: Jon Hardcastle E: Jon@xxxxxxxxxxxxxxx 'There comes a time when you look into the mirror, and you realise that what you see is all that you will ever be. Then you accept it, or you kill yourself. Or you stop looking into mirrors... :)' *********** Please note, I am phasing out jd_hardcastle AT yahoo.com and replacing it with jon AT eHardcastle.com *********** ----------------------- -- 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