![]() ![]() dev/sdb3 51386368 3907027120 1927820376+ fd Linux raid autodetect Install The GRUB Bootloader To The New Drive I/O size (minimum/optimal): 512 bytes / 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes (See fdisk(8).) Check That Both Partition Tables Are The Same :~ # fdisk -l /dev/sda /dev/sdbĭisk /dev/sda: 2000.4 GB, 2000398934016 bytesĢ55 heads, 63 sectors/track, 243201 cylinders, total 3907029168 sectors To zero the first 512 bytes: dd if=/dev/zero of=/dev/foo7 bs=512 count=1 If you created or changed a DOS partition, /dev/foo7, say, then use dd(1) Successfully wrote the new partition table This does not matter for LILO, but the DOS MBR will not boot this disk. Warning: no primary partition is marked bootable (active) Warning: partition 3 does not end at a cylinder boundary Warning: partition 3 does not start at a cylinder boundary Warning: partition 2 does not end at a cylinder boundary Warning: partition 2 does not start at a cylinder boundary Warning: partition 1 does not end at a cylinder boundary Units = sectors of 512 bytes, counting from 0 dev/sdb: unrecognized partition table type ![]() Sfdisk: ERROR: sector 0 does not have an msdos signature ĭisk /dev/sdb: 243201 cylinders, 255 heads, 63 sectors/track Copy The Partition Table From A Healthy Drive :~ # sfdisk -d /dev/sda | sfdisk /dev/sdbĬhecking that no-one is using this disk right now. The lack of md-prefixed partitions shows the disk isn't in use. Physically replace the disk and ensure it's recognised by the system.īefore we start, ensure the new disk isn't in use: :~ # lsblk ![]() :~$ udevadm info -query=all -name=/dev/sdb | grep ID_SERIALĮ: ID_SERIAL=WDC_WD3000FYYZ-01UL1B3_WD-WMC130F4L69UĮ: ID_SERIAL_SHORT=WD-WMC130F4L69U Replacing The Disk It's always important to double-check you're about to take out the right disk □ You're probably going to need something like the serial number to verify you got the right one. ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUEġ Raw_Read_Error_Rate 0x002f 001 001 051 Pre-fail Always FAILING_NOW 5052ĥ Reallocated_Sector_Ct 0x0033 133 133 140 Pre-fail Always FAILING_NOW 2071 Getting The Drive Serial Number SMART overall-health self-assessment test result: FAILED!ĭrive failure expected in less than 24 hours. Smartctl 6.2 r3841 (local build)Ĭopyright (C) 2002-13, Bruce Allen, Christian Franke, = START OF READ SMART DATA SECTION = To fully check the health of the disk, we can use SMART to run a diagnostics check. You can see towards the bottom of the output, it's listed the sda disk as active but the sdb disk as faulty/spare. To double-check which disk has the error, we can pull more details about it from mdadm. Sometimes, you can have issues that mention all or just a subset of disks. Since sda is being reported throughout the message, the error must be with sdb. You can see in the U_ section that one of the disks is not present, otherwise it would be reporting UU. The example above looks like a full disk needs replacement. ![]()
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