vytvareni novych RAID mirrorovych disku

[David Rohleder]

veros-XXXX na tac.cz (Veros Kaplan) writes:

> David Rohleder wrote/napsal:
> : 
> : Ahoj,
> : 
> : nema nekdo nastroj, kterym se da jednoduse vyrobit novy disk, ktery se
> : da vlozit do RAIDu misto jednoho z havarovanych mirrorovanych disku?
> : Osobne se mi to skoro podarilo castecne automatizovat pomoci parted,
> : ale neni to nic moc dilo. Co jsem zatim zjistil:
> : 
> : - parted vyrabi partisny v zavislosti na geometrii, takze kdyz chci
> :   vyrobit partisny tesne za sebou, tak se obcas vzteka, ze se
> :   prekryvaji a nevyrobi ji.
>
> # sfdisk -d | sed s/hda/hdc/ | sfdisk 
>
>   Pokud to má různou geometrii, tak jsem si toho ještě nevšiml :-)

To jsem zkousel, ale take se vzteka. Pritom jsou to dva naprosto
totozne disky. Nechapu, proc si vymysli ruznou geometrii:

hda: ST340016A, ATA DISK drive
hdc: ST340016A, ATA DISK drive
ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
ide1 at 0x170-0x177,0x376 on irq 15
blk: queue c02a6944, I/O limit 4095Mb (mask 0xffffffff)
hda: 78165360 sectors (40021 MB) w/2048KiB Cache, CHS=4865/255/63, UDMA(100)
blk: queue c02a6ca8, I/O limit 4095Mb (mask 0xffffffff)
hdc: 78165360 sectors (40021 MB) w/2048KiB Cache, CHS=77545/16/63, UDMA(100)

fw:~# sfdisk -d /dev/hda | sed 's/hda/hdc/' | sfdisk /dev/hdc
Checking that no-one is using this disk right now ...
OK

Disk /dev/hdc: 77545 cylinders, 16 heads, 63 sectors/track
Old situation:
Units = cylinders of 516096 bytes, blocks of 1024 bytes, counting from 0

   Device Boot Start     End   #cyls   #blocks   Id  System
/dev/hdc1   *      0+   1039    1040-   524128+  fd  Linux raid autodetect
/dev/hdc2       1040    2080    1041    524664   82  Linux swap
/dev/hdc3       2081    8321    6241   3145464   fd  Linux raid autodetect
/dev/hdc4       8322   39529   31208  15728832    f  Win95 Ext'd (LBA)
/dev/hdc5       8322+  18724   10403-  5243080+  fd  Linux raid autodetect
/dev/hdc6      18726+  39529   20804- 10485121+  fd  Linux raid autodetect
New situation:
Units = sectors of 512 bytes, counting from 0

   Device Boot    Start       End  #sectors  Id  System
/dev/hdc1   *        63   1044224   1044162  fd  Linux raid autodetect
/dev/hdc2       1044225   2104514   1060290  82  Linux swap
/dev/hdc3       2104515   8385929   6281415  fd  Linux raid autodetect
/dev/hdc4       8385930  39841199  31455270   f  Win95 Ext'd (LBA)
/dev/hdc5       8385993  18876374  10490382  fd  Linux raid autodetect
/dev/hdc6      18876438  39841199  20964762  fd  Linux raid autodetect
Warning: partition 1 does not end at a cylinder boundary

sfdisk: I don't like these partitions - nothing changed.
(If you really want this, use the --force option.)
fw:~# 

Do stejneho stavu se dostanu, ikdyz mam na zacatku hdc same
nuly. Proste bez force to neudela.
A force mu vnucovat nechci, do takoveho stavu se muzu dostat i s dd.

jeste pro kontrolu:

fw:~# sfdisk -d /dev/hda
# partition table of /dev/hda
unit: sectors

/dev/hda1 : start=       63, size= 1044162, Id=fd, bootable
/dev/hda2 : start=  1044225, size= 1060290, Id=82
/dev/hda3 : start=  2104515, size= 6281415, Id=fd
/dev/hda4 : start=  8385930, size=31455270, Id= f
/dev/hda5 : start=  8385993, size=10490382, Id=fd
/dev/hda6 : start= 18876438, size=20964762, Id=fd

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David Rohleder						davro na ics.muni.cz
Institute of Computer Science, Masaryk University
Brno, Czech Republic
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