Newsgroup: it.comp.os.win.nt
Titolo: Mirroring software

Avendo 2 dischi in mirroring software sia della partizione C: (sistema), che
della partizione D: (programmi + dati),
è sempre possibile riavviare il sistema e continuare ad usare i programmi
quando uno dei due dischi si rompe
e viene sostituito?
Grazie
TopGun

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Si, avendo l'accortezza di definire il disco rimasto attivo come
master o , se scsi, di boot. cmq per sicurezza fai anche un floppy di
partenza di nt
Saluti Maurizio
Remove YYY

"Maurizio V." <violi...@YYYfonspa.it> wrote in message
news:388810d6.2905678@proxy...

Questo perche' in effetti il disco 2 del mirroring non e' considerato
bootable a tutti gli effetti. Quindi se si rompe l'1 anche se metti il 2
come master questo non partira'. Per fare il disco di boot devi formattare
un floppy su una macchina NT, poi ci copy sopra l'NTLD, il boot.ini e
l'NTdetect. Poi editi il boot.ini e modifichi la riga MULTI per farlo
puntare al secondo disco. Sotto c'e' un articolo al riguardo.
Bye
Gianluca Zanelotto
Ducati ST2 "Red Devil"
(In un bellissimo Country Hotel nel mezzo del nulla della brughiera
inglese...)
How to Recover Mirroring Windows NT Using IDE Devices         [winnt]
ID: Q141702    CREATED: 21-DEC-1995   MODIFIED: 05-FEB-1999
winnt:3.5,3.51,4.0
winnt
PUBLIC | ntsetup
\* Security       : PUBLIC
======================================================================
3.50 3.51
WINDOWS NT
kbsetup kbhowto
----------------------------------------------------------------------------
---
The information in this article applies to:
 - Microsoft Windows NT Server versions 3.5, 3.51, 4.0
----------------------------------------------------------------------------
---
SUMMARY
=======
This article provides the steps necessary to recover mirroring using IDE
devices
under Windows NT. Use this article in conjunction with the following
articles in
the Microsoft Knowledge Base, which explains how to create an Windows NT
Fault
Tolerant Boot Disk:
ARTICLE-ID: Q119467
TITLE: Creating a Boot Disk for an NTFS or FAT Partition
ARTICLE-ID: Q102873
TITLE: BOOT.INI and ARC Path Naming Convention and Usage
Soft Mirroring (Windows NT) does NOT mirror MBR/PT entries, as soft
mirroring is
only designed to mirror a partition's data, and cannot guarantee boot
capability
of the shadow, or mirrored drive. It is important that you always have a
valid
Windows NT fault tolerant startup floppy disk created in the event that the
primary drive fails.
ARTICLE-ID: Q117131
TITLE: Master Boot Record Not Written To Mirrored Shadow Partition
MORE INFORMATION
================
The IDE specification requires that a working master drive be available at
all
times to gain access to other IDE drives on the system. The steps that
follow
are the appropriate steps to mirror an IDE hard drive with another.
Step-by-Step Procedures
-----------------------
If the shadow (mirrored) hard drive is on the same channel set as an IDE
slave
device, use the "Failed Primary on the Same IDE Channel" section of this
article
below.
If the shadow (mirrored) hard drive is on the secondary channel across from
the
failed primary drive then see the "Failed Primary is on the Primary IDE
Channel
and the Shadow is on the Secondary" section of this article below.
FAILED PRIMARY ON THE SAME IDE CHANNEL (SHADOW DRIVE IS A SLAVE IDE DEVICE)
*** If the replacement drive has already been installed: ***
1. Edit the Boot.ini file in you Windows NT FT startup disk to point to:
   multi(0)disk(0)rdisk(1)...
2. If the replacement drive is not identical to the failed IDE hard drive,
you
   must go into CMOS and use either the AUTO DETECT HARD DRIVE feature in
your
   CMOS, or manually set the new hard drive Heads/Cylinders/Sectors.
3. Start the Windows NT FT startup disk and load Windows NT.
4. Start Disk Administrator, and break the mirror.
5. Establish another mirror by mirroring from the slave hard drive to the
master
   drive.
*** If the replacement drive has not been installed: ***
1. Verify that the jumper on the shadow IDE hard drive is moved from Slave
to
   master or standalone.
2. Edit the Boot.ini file in the Windows NT FT startup disk, to point to:
   multi(0)disk(0)rdisk(0)...
3. If the shadow drive is not identical to the failed IDE hard drive, you
must
   go into CMOS and use either the AUTO DETECT HARD DRIVE feature in your
CMOS
   or manually set the new hard drive Heads/Cylinders/Sectors.
4. Start the Windows NT FT startup disk, and load Windows NT.
5. Start Disk Administrator, and break the mirror.
6. Establish another mirror by mirroring from this hard drive to the new
shadow
   (IDE Slave) drive.
Failed primary is master the on the primary IDE channel and the shadow is
master
on the secondary IDE Channel
***If the replacement drive has already been installed:***
1. Edit the Boot.ini file of your Windows NT FT startup disk to point to:
   multi(1)disk(0)rdisk(0) if the shadow drive is the master device of the
   secondary channel multi(0)disk(0)rdisk(2) may also work
   multi(1)disk(0)rdisk(1) if the Shadow drive is the Slave Device of the
   Secondary Channel Multi(0)disk(0)rdisk(3) may also work.
2. If the replacement drive is not identical to the failed IDE hard drive,
you
must go into CMOS and use either the AUTO DETECT HARD DRIVE feature in your
CMOS
or manually set the new hard drive Heads/Cylinders/Sectors. 3. Start the
Windows
NT FT startup disk and load Windows NT. 4. Start Disk Administrator, and
break
the mirror. 5. Establish another mirror by mirroring from the this hard
drive to
the new Shadow drive.
***If the replacement drive has not been installed:***
1. Move the shadow drive to the primary channel as the master device and
ensure
it is jumpered in the same manner as the failed primary drive.
2. Edit the Boot.ini file in your Windows NT FT startup disk to point to:
   multi(0)disk(0)rdisk(0)
   if the shadow drive is the master device of the primary channel.
   multi(0)disk(0)rdisk(1)
   if the shadow drive is the slave device of the primary channel.
1. If the shadow drive is not identical to the failed primary IDE hard
drive,
   you must go into CMOS and use either the AUTO DETECT HARD DRIVE feature
in
   your CMOS or manually set the new hard drive Heads/Cylinders/Sectors.
2. Start the Windows NT FT startup disk and load Windows NT.
3. Start Disk Administrator, and break the mirror.
4. Establish another mirror by mirroring from this hard drive to the new
shadow
   drive.

In linea di massima si, pero' al contrario di come accade nei mirror
hardware in cui all'occorrenza il mirror viene spezzato e ricostruito in
occasione della sostituzione del disco (in maniera automatica), devi fare un
dischetto di boot per nt .
Se non ricordo male a cosa si fa inq uesta maniera:
- Si prende un foppy e lo si formatta da NT
- Ci si copiano sopra: ntldr boot.ini e 
ntdetect.com
- Si prende il file boot.ini e lo si edita indicando di fare il boot dalla
prima partizione del secondo disco (se non sbaglio dovrebbe essere circa
cosi': multi(0)disk(1)rdisk(0)partition(1), mentre dovresti avere di default
multi(0)disk(0)rdisk(0)partition(1)).
Cio' si rende necessario se e solo se si spacca il primo disco (e devi poter
partire dal secondo).
Poi, dopo aver fatto il boot, si va in disk adminstrator, menu fault
tolerance, break mirror. In questa maniera spezzi il mirror e ti ritrovi due
dischi fisici partizionati ad uno ad uno.
Cambi il disco rotto, ne monti uno nuovo, riparti e gli dici di ristabilire
il mirror.
Ciao
--
diego....@gara.it
Inverti gara per rispondermi

inglese...)
... dilla tutta... con un bel po' di pioggerella inglese :-)))
Saluti Maurizio
Remove YYY

 altro che spostare il jumper dello slave e ripartire. Il floppy di
Di fondo se tu metti come secondo disco uno che non e' mai stato formattato,
proprio brand new e ci fai sopra il mirroring di NT questo non parte da solo
perche' non ha il boot sector. Se invece metti un disco gia' utilizzato la
cosa puo' funzionare. Oppure in certi casi basta fare il boot da floppy e
lanciare un bel fdisk /mbr.
Inoltre e' meno complicato inserire un floppy che aprire la macchina e
spostare in jumper..:-)))


inglese...)
sempre con la pioggerella :-))
Saluti Maurizio
Remove YYY