The progress and time remaining for any volume operation – like rebuilding or validating a volume.For volumes which are protected from disk failure, validating also makes sure that all mirror disks and parity information is correct. Validating a volume ensures that all sectors are readable. The last time the volume was validated.The choices are: Workstation, Server, Digital Video, Digital Audio or Digital Photography This tells SoftRAID how to prioritize rebuild and validate operations relative to file reads and writes. ![]() It also prevents a volume’s disks from accidentally being initialized or overwritten. A safeguard prevents a volume from being accidentally erased or deleted. There’s a lot of important information shown on your volume tile: You can click on a volume tile to see which disks it uses. They also show you whether a volume is degraded, i.e no longer protected from a failing disk. Volume tiles show you the size and RAID level of each volume. A RAID volume uses parts of two or more disks to store your files. SoftRAID displays a tile for all volumes which your Mac can access without using a network. You can click on the disclosure triangle to see more information about a volume and whether it has encountered any errors. *SMART is a monitoring system in disk drives that SoftRAID Monitor uses to assess drive reliability and anticipate drive failures.Ī volume tile shows you information about a volume. The progress and time remaining for any disk operation – like certifying or verifying a disk.The number of hours a disk has been used.The disk above has been labeled: “Offsite Backup #1.” The SoftRAID Monitor uses a disk’s label when reporting errors in dialog boxes, log files or via email. The label is a name you can add to make it easier to keep track of a particular disk. Any label you have added to this disk.SoftRAID uses internal counters in each disk to determine if a disk is more likely to fail. The SMART* status of a disk – this is checked each time you run the SoftRAID application, every time you startup your Mac and every 24 hours while your Mac is running.There’s a lot of information shown on your disk tile: You can also click on a disk tile to see which volumes use that disk. SoftRAID displays a separate tile for each disk connected to your Mac.Īll SSDs and external disk drives connected via Thunderbolt, SATA, FireWire, Fibre or USBĬonnected USB flash drives (aka thumb drive) – yes, SoftRAID even works with those!ĭisk tiles show you whether a disk is working correctly or needs to be replaced. You can click on the disclosure triangle to see more information about a disk and whether you need to replace it. This is done by using the tool resize2fs.A disk tile shows you the size and type of a disk attached to your Mac. e2fsck -f /dev/md0Īfter the e2fsck ended without errors, the file system can be extended. To be able to use the 30TB available on the RAID5, you need to resize the file system. This is because the md0 has capacity of 30 TB, but the ext4 filesystem is still configured to make use of 20 TB. The RAID5 consists now of 4 HDD, all working. To learn how to increase the speed the sync, see my other blog about this topic. This command will trigger a RAID rebuild, as the information must be distributed to the HDDs. The command informs the RAID that there are now 4 HDDs to be used, instead of 3. To make the RAID5 aware of the new disk and that it should be used for data storage, the RAID must be informed to use the new HDD using the grow command. ![]() This gives me less trouble in case a device fails, as I won’t have to do anything, but it won’t give me more space. In case a device would fail, the spare device will take over automatically and a RAID rebuild will be triggered. ![]() ![]() The result of the operation can be seen in mdstat. To add a new disk, option –add is used and the raid and new disk are passed as parameters. The RAID is a software RAID on Linux, therefore mdadm is used to control the raid. Next is to create the partition using parted. parted -s -a optimal /dev/sdd mklabel gpt The disk is /dev/sdd and needs to have a partition. mountįirst start with the preparation of the new disk. The RAID5 is formatted with ext4 and available as md0. Currently, the RAID5 disks are sdc1, sdf1 and sde1. I bought a new 10 TB HDD that I want to use to extend the RAID5: 4 HDDs with a total capacity of 30 TB. This RAID5 has a total capacity of 20 TB. I have a RAID5 consisting of three 10TB HDDs.
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