On Dec 19, 2007 10:33 AM, Yahya Mohammad <[EMAIL PROTECTED]> wrote: > I have an nforce5 motherboard set up with two disks in a RAID0 > configuration. The BIOS menu shows "Striping block" as 64K and "Striping > width" as 2. What exactly does this mean? Is 64K the smallest possble > chunk size written to a single disk? I want to know what's the optimum > value for the "stride" parameter to pass to mke2fs -E when using ext3 > with 4K blocks. > > I activated the array with dmraid and looked at some of its info output. > But the various stride, stripeSize, and stripBlockSize values below > don't make sense to me: > > # dmraid -s > *** Active Set > name : nvidia_abcbdgeb > size : 1953546240 > stride : 128 > type : stripe > status : ok > subsets: 0 > devs : 2 > spares : 0 > > # dmraid -n > /dev/sda (nvidia): > 0x000 NVIDIA > 0x008 size: 30 > 0x00c chksum: 4068594016 > 0x010 version: 100 > 0x012 unitNumber: 0 > 0x013 reserved: 0 > 0x014 capacity: 1953546240 > 0x018 sectorSize: 512 > 0x01c productID: STRIPE 931.52G > 0x02c productRevision: 100 > 0x030 unitFlags: 0 > 0x034 array->version: 6553668 > 0x038 array->signature[0]: 658758547 > 0x03c array->signature[1]: 1476699144 > 0x040 array->signature[2]: 414004829 > 0x044 array->signature[3]: 332144723 > 0x048 array->raidJobCode: 0 > 0x049 array->stripeWidth: 2 > 0x04a array->totalVolumes: 2 > 0x04b array->originalWidth: 2 > 0x04c array->raidLevel: 128 > 0x050 array->stripeBlockSize: 128 > 0x054 array->stripeBlockByteSize: 65536 > 0x058 array->stripeBlockPower: 7 > 0x05c array->stripeMask: 127 > 0x060 array->stripeSize: 256 > 0x064 array->stripeByteSize: 131072 > 0x068 array->raidJobMark 0 > 0x06c array->originalLevel 128 > 0x070 array->originalCapacity 1953546240 > 0x074 array->flags 0x1 > > /dev/sdb (nvidia): > 0x000 NVIDIA > 0x008 size: 30 > 0x00c chksum: 4068528480 > 0x010 version: 100 > 0x012 unitNumber: 1 > 0x013 reserved: 0 > 0x014 capacity: 1953546240 > 0x018 sectorSize: 512 > 0x01c productID: STRIPE 931.52G > 0x02c productRevision: 100 > 0x030 unitFlags: 0 > 0x034 array->version: 6553668 > 0x038 array->signature[0]: 658758547 > 0x03c array->signature[1]: 1476699144 > 0x040 array->signature[2]: 414004829 > 0x044 array->signature[3]: 332144723 > 0x048 array->raidJobCode: 0 > 0x049 array->stripeWidth: 2 > 0x04a array->totalVolumes: 2 > 0x04b array->originalWidth: 2 > 0x04c array->raidLevel: 128 > 0x050 array->stripeBlockSize: 128 > 0x054 array->stripeBlockByteSize: 65536 > 0x058 array->stripeBlockPower: 7 > 0x05c array->stripeMask: 127 > 0x060 array->stripeSize: 256 > 0x064 array->stripeByteSize: 131072 > 0x068 array->raidJobMark 0 > 0x06c array->originalLevel 128 > 0x070 array->originalCapacity 1953546240 > 0x074 array->flags 0x1 > > Thanks for any clarification. Any other tips for setting up the > filesystem would be welcome. I'll be mostly using this box as a media > server and some gaming. > -- > [EMAIL PROTECTED] mailing list > > I suggest reading this: http://gentoo-wiki.com/HOWTO_Gentoo_Install_on_Bios_(Onboard)_RAID
-- - Mark Shields
