02-13-2010
To be fair RAID 5 is going to be better than a single disc or jut a mirrored pair of discs.
Performance tuning is not an exact art, the figures can look terrible but if the machine is performing the task you want it to do okay then they are not a problem, if the machine is performing the required task then you start looking at the figures to see where the bottle neck is, once you deal with it another bottle neck may also need dealing with.
Suggestions:
Copy the contents of your current disks onto another set of discs in a stripe then reconstruct your RAID 5 set of discs into a stripe and mirror them against the first stripe?
Copy your current RAID 5 configuration onto 10K RPM discs?
Ensure you are using the fastest interface possible for your platform, i.e. SCSI or SATA tend to be faster than IDE?
Last edited by TonyFullerMalv; 02-13-2010 at 05:30 PM..
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LEARN ABOUT CENTOS
grub-file
GRUB-FILE(1) User Commands GRUB-FILE(1)
NAME
grub-file - check file type
SYNOPSIS
file OPTIONS FILE
DESCRIPTION
Check if FILE is of specified type.
--is-i386-xen-pae-domu
Check if FILE can be booted as i386 PAE Xen unprivileged guest kernel
--is-x86_64-xen-domu
Check if FILE can be booted as x86_64 Xen unprivileged guest kernel
--is-x86-xen-dom0
Check if FILE can be used as Xen x86 privileged guest kernel
--is-x86-multiboot
Check if FILE can be used as x86 multiboot kernel
--is-x86-multiboot2 Check if FILE can be used as x86 multiboot2 kernel
--is-arm-linux
Check if FILE is ARM Linux
--is-arm64-linux
Check if FILE is ARM64 Linux
--is-ia64-linux
Check if FILE is IA64 Linux
--is-mips-linux
Check if FILE is MIPS Linux
--is-mipsel-linux
Check if FILE is MIPSEL Linux
--is-sparc64-linux
Check if FILE is SPARC64 Linux
--is-powerpc-linux
Check if FILE is POWERPC Linux
--is-x86-linux
Check if FILE is x86 Linux
--is-x86-linux32
Check if FILE is x86 Linux supporting 32-bit protocol
--is-x86-kfreebsd
Check if FILE is x86 kFreeBSD
--is-i386-kfreebsd
Check if FILE is i386 kFreeBSD
--is-x86_64-kfreebsd
Check if FILE is x86_64 kFreeBSD
--is-x86-knetbsd
Check if FILE is x86 kNetBSD
--is-i386-knetbsd
Check if FILE is i386 kNetBSD
--is-x86_64-knetbsd Check if FILE is x86_64 kNetBSD
--is-i386-efi
Check if FILE is i386 EFI file
--is-x86_64-efi
Check if FILE is x86_64 EFI file
--is-ia64-efi
Check if FILE is IA64 EFI file
--is-arm64-efi
Check if FILE is ARM64 EFI file
--is-arm-efi
Check if FILE is ARM EFI file
--is-hibernated-hiberfil
Check if FILE is hiberfil.sys in hibernated state
--is-x86_64-xnu
Check if FILE is x86_64 XNU (Mac OS X kernel)
--is-i386-xnu
Check if FILE is i386 XNU (Mac OS X kernel)
--is-xnu-hibr
Check if FILE is XNU (Mac OS X kernel) hibernated image
--is-x86-bios-bootsector
Check if FILE is BIOS bootsector
-h, --help Display this help and exit. -u, --usage Display the usage of this command and exit.
SEE ALSO
The full documentation for grub-file is maintained as a Texinfo manual. If the info and grub-file programs are properly installed at your
site, the command
info grub-file
should give you access to the complete manual.
grub-file (GRUB) 2.02-2ubuntu8.3 July 2018 GRUB-FILE(1)