Oracle Exam 1Z0-821 Topic 3 Question 70 Discussion

Actual exam question for Oracle's 1Z0-821 exam

Question #: 70
Topic #: 3

On localSYS, your SPARC based server, you back up the root file system with recursive snapshots of the root pool. The snapshots are stored on a remote NTS file system.

This information describes the remote system where the snapshots are stored:

Remote system name: backupSYS

File system whore the snapshots are stored: /backups/localSYS

Mounted file system on localSYS: /rpool/snaps

Most recent backup name: rpool-1202

Disk c0t0d0 has failed in your root pool and has been replaced. The disk has already been part< and labeled and now you need to restore the root file system. Which procedure would you follow to restore the ZFS root file system on localSYS?

Aboot cdrom -smount -f nfs backup_server:/rpool/snaps /rmtzpool create rpool c0t0d0s0cat /mnt/rpool.1202 | zfs receive -Fdu rpoolzpool set bootfs=rpool/ROOT/solaris rpoolRecreate swap and dump devices.Reinstall the bootblock on c0t0d0.

Bboot cdrom -smount -f nfs backup_server:/rpool/snaps /mntzpool create rpool c0t0d0s0zfs create -o mountpoint=/ rpool/ROOTcat /mnt/rpool.1011 | zfs receive -Fdu rpoolzpool set bootfs=rpool/ROOT/solaris rpoolRecreate swap and dump devices.Reinstall the bootblock on c0t0d0.

Cboot cdrom -smount -F nfs backup_server:/rpool/snaps /mntcat /mnt/rpool.1011 | zfs receive -Fdu rpoolzpool set bootfs=rpool/ROOT/solaris rpool c0t0d0s0Reinstall the bootblock on c0t0d0s0

Dboot cdrom -smount -f nfs backup_server:/rpool/snaps /rmtzpool create rpool c0t0d0s0zfs receive -Fdu /mnt/rpool.1011zpool set bootfs=rpool/ROOT/solaris rpoolReinstall the bootblock on c0t0d0.

Show Suggested Answer

Suggested Answer: A

shadowd is a daemon that provides background worker threads to migrate data for a shadow migration. A shadow migration gradually moves data from a source file system into a new ''shadow'' file system. Users can access and change their data within the shadow file system while migration is occurring.

The shadowd service is managed by the service management facility, smf(5). Administrative actions on this service, such as enabling, disabling, or requesting restart, can be performed using svcadm(1M). The service's status can be queried using the svcs(1) command.

The svccfg(1M) command can be used to manage the following parameter related to shadowd:

config_params/shadow_threads

Note: Oracle Solaris 11: In this release, you can migrate data from an old file system to a new file system while simultaneously allowing access and modification of the new file system during the migration process.

Setting the shadow property on a new ZFS file system triggers the migration of the older data. The shadow property can be set to migrate data from the local system or a remote system with either of the following values:

file:///path

nfs://host:path

by Sylvia at Aug 08, 2023, 04:23 AM

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Arlene

21 days ago

I'm not sure, but option B also looks like a valid procedure with creating the ZFS file system and setting the bootfs.

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Graham

23 days ago

I agree with Johnna, option A seems to be the right choice because it includes recreating swap and dump devices.

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Viva

23 days ago

Hmm, this looks like a tricky ZFS root filesystem restoration question. I better carefully review the options and make sure I understand the steps involved.

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Sol

3 days ago

B) boot cdrom -smount -f nfs backup_server:/rpool/snaps /mntzpool create rpool c0t0d0s0zfs create -o mountpoint=/ rpool/ROOTcat /mnt/rpool.1011 | zfs receive -Fdu rpoolzpool set bootfs=rpool/ROOT/solaris rpoolRecreate swap and dump devices.Reinstall the bootblock on c0t0d0.

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Ramonita

7 days ago

A) boot cdrom -smount -f nfs backup_server:/rpool/snaps /rmtzpool create rpool c0t0d0s0cat /mnt/rpool.1202 | zfs receive -Fdu rpoolzpool set bootfs=rpool/ROOT/solaris rpoolRecreate swap and dump devices.Reinstall the bootblock on c0t0d0.

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Johnna

26 days ago

I think the correct procedure is option A.

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