Mirroring se diskous

[Panayotis Vryonis]

George Daflidis-Kotsis wrote:

> On Fri, Mar 17, 2000 at 02:57:40PM +0200, Nikolas Stylianides wrote:
>
> > H diadikasia omos ayth gia na ginei telika mirroring o skliros pos ginetai
>
> Einai ligo periergh me8odos gia backup omologoumenws, alla auto pou
> prepei na kaneis einai na baleis tous duo diskous epanw sto mhxanhma.
>
> O kurios sou 8a einai /dev/sc0 p.x. kai o backup /dev/sc1
>
> Opote kaneis, xwris na exeis formatted n' mounted ton deutero disko,
>
> dd if=/dev/sc0 of=/dev/sc1 bs=128k (to bs= mporeis kai na mhn to xrhsimopoieis
> ka8olou alla an to oriseis 128k 8a epitaxunei th diadikasia, eidika an exeis
> pollh mnhmh).
>
> 8a sou proteina afou teleiwsei auth h diadikasia na aposundeseis ton backup
> disko giati opws mporei na sbhstei o kurios mporei na sbhstei kai o backup ;-)
>
> Auto einai kai to problhma sth sugkekrimenh lush.
>

Apo thn allh, uparxei kai h lush tou software RAID... BTW, DEN xreiazetai
na exoun thn idia gewmetria oi diskoi gia na ginei software RAID-1 (mirroring),
to exw dokimasei. To sxetiko RAID-HOWTO einai katatopistikotato.

Akomh, se anti8esh me o,ti anafer8hke, mporei
akomh kai to root filesystem na brisketai se software raid-1 disko,
alla einai enas sxetikos mpelas to sthsimo... (kai prosoxh, o kernel
prepei na exei uposthriksh gia raid-1, oxi san module!).

Me thn lush tou raid-1 den glutwneis an kaneis ena rm -rf /, alla
an xtuphsei o enas diskos, sunexizeis na douleueis xwris na
pa8eis tipota... Apla ton allazeis, kai eisai etoimos (xondrika).

Panayotis.
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