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LINUX DISK HEALTH DRIVER
It can be regular read/write operations, memory mapping the file, splice, async IO or SCSI generic operations via the SG driver in Linux kernel. IO size: Represents how much data is going to be written or read.In order to get close to the real application scenario, you can choose to use the block size that the application uses or a range of block sizes. Block size: This represents how large are the chunks for each IO issued.IO type: sequential read/write, random read/write, mixt read and write, random read and write.And the best tool to do that is fio.įio is the most complete tool for disk performance testing and it basically simulates a desired IO workload via a job that one or more threads and can contain quite a lot of parameters.Ī few of the most important parameters that can be used are: Soon you'll be interested in your disk performance. Let's say that the disk is now visible, you partition it, use it in a raid-group (and you'd better do that), schedule a backup policy for the newly created filesystem (you'd better do that too) and start using it. In the above command the hyphens stand for controller, channel, lun so "-" indicates that all controllers, channels, and luns are to be scanned. The next command can be used to rescan the bus:Įcho "-" > /sys/class/scsi_host/host6/scan sys/class/scsi_host/host6/proc_name:mpt2sas and host6 in this case is the bus number. Grep mpt /sys/class/scsi_host/host?/proc_name When no changes on the SCSI bus are seen or it takes a long time you can simply follow the next.įirst you must find your host bus number. If the SCSI Bus refresh works automatically, it usually can be seen in the system logs and it looks something like this. Sometimes when physically adding or removing a disk you get a proper delay from the Linux kernel in sensing the SCSI bus change. Hopefully this will save someone the two hours it took me of digging and searching for a Utility that worked for me.Let's first start with a little trick that helps you rescan the SCSI bus when adding or removing a disk from the system. Essentially the command outputs all information for the Device /dev/sdX where X is the drive letter indicated by Linux. Once booted, I fired up the Terminal and proceeded to figure out what the command was to get the required SMART Information.Įventually I received the information I needed.
LINUX DISK HEALTH WINDOWS 10
I went the UNetBootin route on Windows 10 and booted from my Storage Server via IPMI. I won’t go into detail how I was able to create a GParted Live USB as its detailed on their page. So how did I do it? It’s simple, GParted and the Command Line. Okay getting annoyed now, let’s try my HBA in passthrough mode. How about the SAS Controller, still no go. I figured I’d plug in the drives into a motherboard and off I go. Notice the Prongs on the end of the Adapter.
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Unfortunately that doesn’t work because the SAS to Sata Adapters doesn’t allow a connection. I came across a unique situation, I needed to verify health of my HGST HUSML4040ASS600 400GB SAS Hard Drives, but how do you do that? I grabbed my USB to SATA adapter and used a Windows Program like HDSentinel or CrystalDiskInfo. Priorities have changed, and when you can sell a parted out server for the cost of a home insulation job or a new heating system, it’s time to do that. I’m in the process of selling a VMware Server Lab build that has outlived it’s usefulness.