Hello and thanks for your reply. Yes I have four disks @ 500G each. I think they are all OK, but have not taken the server apart to check the hard disks.Anyway trying your commands, t... [by abevec1]
People keep telling me that in order to improve SQL server performance, buy the fastest hard disks possible with Raid 5 and etc.
So I was thinking, instead of spending all the money for Raid 5 and super-duper fast hard disks (which isn't cheap by the way), why not just get tonnes of RAM? We know that SQL server loads the database into memory.
Looking at hard disks in my shop seems to diverge from what larger centers experience. I tend to use disks for a long time. Big 2 TB disks hold a lot of software so I have not needed to move to bigger ones. Yet.
Working on my page, I realized I was all wrong. Again. Sure my MTBF number is all proper, the problem is that I retire functional disks.
I'm about to reinstall one server and noticed that this particular server has older disks with 512B physical sector size, while other machines have disks with 4K physical sector size. On newer disks we have GPT, but what about these older ones?
Is there any performance penalty for using GPT on 512B sectors (like translation overhead when using 4K disks with MBR)?
I have a HP Proliant DL 380 G7 Server with a RAID 5 that has 2 failed disks.
My Question is, can i reduce the array to 3 hard disks that are remaining to work with them alone? Can I do this without loosing any data in the hard disks?
what is the command in Solaris/Unix which I can use to determine how many hard disks exist in the system?
I have tried with different command such as df -lk and similar but cannot know for sure how many actual disks are installed.
Commands like #
fdisk -l | grep Disk and #
lshw -short -C disk doesn't work in Solaris.
I have a Sony laptop model Z something (I don't have it with me right now), with a solid state disk. Until recently, Fedora (rather, the kernel) assigns to the disks the device /dev/md126p?, with the partition numbers. However, the two latest kernel releases in Fedora17 (3.6.7-4 and 3.6.8-2) do not recognize the disks, so cannot boot.
Currently, I have 4 hard disks which have been configured as RAID 1+0 in HP Proliant 380 G7, SmartArray p410i. I am planning to buy other new 8 hard disks to replace old array by swapping the disks out and keep the old array as backup. I also make full backup and I will use this backup to restore to new 8 hard disk array.