| 1 |
I have an nforce5 motherboard set up with two disks in a RAID0 |
| 2 |
configuration. The BIOS menu shows "Striping block" as 64K and "Striping |
| 3 |
width" as 2. What exactly does this mean? Is 64K the smallest possble |
| 4 |
chunk size written to a single disk? I want to know what's the optimum |
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value for the "stride" parameter to pass to mke2fs -E when using ext3 |
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with 4K blocks. |
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|
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I activated the array with dmraid and looked at some of its info output. |
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But the various stride, stripeSize, and stripBlockSize values below |
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don't make sense to me: |
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|
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# dmraid -s |
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*** Active Set |
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name : nvidia_abcbdgeb |
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size : 1953546240 |
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stride : 128 |
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type : stripe |
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status : ok |
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subsets: 0 |
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devs : 2 |
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spares : 0 |
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|
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# dmraid -n |
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/dev/sda (nvidia): |
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0x000 NVIDIA |
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0x008 size: 30 |
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0x00c chksum: 4068594016 |
| 28 |
0x010 version: 100 |
| 29 |
0x012 unitNumber: 0 |
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0x013 reserved: 0 |
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0x014 capacity: 1953546240 |
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0x018 sectorSize: 512 |
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0x01c productID: STRIPE 931.52G |
| 34 |
0x02c productRevision: 100 |
| 35 |
0x030 unitFlags: 0 |
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0x034 array->version: 6553668 |
| 37 |
0x038 array->signature[0]: 658758547 |
| 38 |
0x03c array->signature[1]: 1476699144 |
| 39 |
0x040 array->signature[2]: 414004829 |
| 40 |
0x044 array->signature[3]: 332144723 |
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0x048 array->raidJobCode: 0 |
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0x049 array->stripeWidth: 2 |
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0x04a array->totalVolumes: 2 |
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0x04b array->originalWidth: 2 |
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0x04c array->raidLevel: 128 |
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0x050 array->stripeBlockSize: 128 |
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0x054 array->stripeBlockByteSize: 65536 |
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0x058 array->stripeBlockPower: 7 |
| 49 |
0x05c array->stripeMask: 127 |
| 50 |
0x060 array->stripeSize: 256 |
| 51 |
0x064 array->stripeByteSize: 131072 |
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0x068 array->raidJobMark 0 |
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0x06c array->originalLevel 128 |
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0x070 array->originalCapacity 1953546240 |
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0x074 array->flags 0x1 |
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|
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/dev/sdb (nvidia): |
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0x000 NVIDIA |
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0x008 size: 30 |
| 60 |
0x00c chksum: 4068528480 |
| 61 |
0x010 version: 100 |
| 62 |
0x012 unitNumber: 1 |
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0x013 reserved: 0 |
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0x014 capacity: 1953546240 |
| 65 |
0x018 sectorSize: 512 |
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0x01c productID: STRIPE 931.52G |
| 67 |
0x02c productRevision: 100 |
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0x030 unitFlags: 0 |
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0x034 array->version: 6553668 |
| 70 |
0x038 array->signature[0]: 658758547 |
| 71 |
0x03c array->signature[1]: 1476699144 |
| 72 |
0x040 array->signature[2]: 414004829 |
| 73 |
0x044 array->signature[3]: 332144723 |
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0x048 array->raidJobCode: 0 |
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0x049 array->stripeWidth: 2 |
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0x04a array->totalVolumes: 2 |
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0x04b array->originalWidth: 2 |
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0x04c array->raidLevel: 128 |
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0x050 array->stripeBlockSize: 128 |
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0x054 array->stripeBlockByteSize: 65536 |
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0x058 array->stripeBlockPower: 7 |
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0x05c array->stripeMask: 127 |
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0x060 array->stripeSize: 256 |
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0x064 array->stripeByteSize: 131072 |
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0x068 array->raidJobMark 0 |
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0x06c array->originalLevel 128 |
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0x070 array->originalCapacity 1953546240 |
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0x074 array->flags 0x1 |
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|
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Thanks for any clarification. Any other tips for setting up the |
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filesystem would be welcome. I'll be mostly using this box as a media |
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server and some gaming. |
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-- |
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