Download SQL Server 2014 Developer Edition Free
Microsoft has announced that the SQL Server 2014 Developer Edition will available for free to Visual Studio Dev Essentials members. This announcement came in on Mar 31, 2016. This is indeed a great move from Microsoft to allow developers to download and explore SQL Server 2014 along with other relevant Microsoft Developer Products by becoming a member of Visual Studio Dev Essentials.
Developers can use Microsoft SQL Server 2014 Developer Edition for Development and Testing Purposes only. To use SQL Server 2014 on Production and Non-Production environments one must buy a valid license. For more information, see How to Buy SQL Server?.
Clearing the password from the BIOS - laptop
To remove the password from the BIOS or the password protecting the hard disk you can use a ready program that generates a password based on information from the system.
Link do generatora haseł:
http://biospasswordhelp.blogspot.com/2011/03/bios-password-help.html
Replacing A Failed Hard Drive In A Software RAID1 Array.
Replacing A Failed Hard Drive In A Software RAID1 Array.
Replacing A Failed Hard Drive In A Software RAID1 Array. This guide shows how to remove a failed hard drive from a Linux RAID1 array (software RAID), and how to add a new hard disk to the RAID1 array without losing data.
NOTE: There is a new version of this tutorial available that uses gdisk instead of sfdisk to support GPT partitions.
1 Preliminary Note
In this example I have two hard drives, /dev/sda and /dev/sdb, with the partitions /dev/sda1 and /dev/sda2 as well as /dev/sdb1 and /dev/sdb2.
/dev/sda1 and /dev/sdb1 make up the RAID1 array /dev/md0.
/dev/sda2 and /dev/sdb2 make up the RAID1 array /dev/md1.
/dev/sda1 + /dev/sdb1 = /dev/md0
/dev/sda2 + /dev/sdb2 = /dev/md1
/dev/sdb has failed, and we want to replace it.
2 How Do I Tell If A Hard Disk Has Failed?
If a disk has failed, you will probably find a lot of error messages in the log files, e.g. /var/log/messages or /var/log/syslog.
You can also run
cat /proc/mdstat
and instead of the string [UU] you will see [U_] if you have a degraded RAID1 array.
3 Removing The Failed Disk
To remove /dev/sdb, we will mark /dev/sdb1 and /dev/sdb2 as failed and remove them from their respective RAID arrays (/dev/md0 and /dev/md1).
First we mark /dev/sdb1 as failed:
mdadm --manage /dev/md0 --fail /dev/sdb1
The output of
cat /proc/mdstat
should look like this:
server1:~# cat /proc/mdstat
Personalities : [linear] [multipath] [raid0] [raid1] [raid5] [raid4] [raid6] [raid10]
md0 : active raid1 sda1[0] sdb1[2](F)
24418688 blocks [2/1] [U_]
md1 : active raid1 sda2[0] sdb2[1]
24418688 blocks [2/2] [UU]
unused devices:
Then we remove /dev/sdb1 from /dev/md0:
mdadm --manage /dev/md0 --remove /dev/sdb1
The output should be like this:
server1:~# mdadm --manage /dev/md0 --remove /dev/sdb1
mdadm: hot removed /dev/sdb1
And
cat /proc/mdstat
should show this:
server1:~# cat /proc/mdstat
Personalities : [linear] [multipath] [raid0] [raid1] [raid5] [raid4] [raid6] [raid10]
md0 : active raid1 sda1[0]
24418688 blocks [2/1] [U_]
md1 : active raid1 sda2[0] sdb2[1]
24418688 blocks [2/2] [UU]
unused devices:
Now we do the same steps again for /dev/sdb2 (which is part of /dev/md1):
mdadm --manage /dev/md1 --fail /dev/sdb2
cat /proc/mdstat
server1:~# cat /proc/mdstat
Personalities : [linear] [multipath] [raid0] [raid1] [raid5] [raid4] [raid6] [raid10]
md0 : active raid1 sda1[0]
24418688 blocks [2/1] [U_]
md1 : active raid1 sda2[0] sdb2[2](F)
24418688 blocks [2/1] [U_]
unused devices:
mdadm --manage /dev/md1 --remove /dev/sdb2
server1:~# mdadm --manage /dev/md1 --remove /dev/sdb2
mdadm: hot removed /dev/sdb2
cat /proc/mdstat
server1:~# cat /proc/mdstat
Personalities : [linear] [multipath] [raid0] [raid1] [raid5] [raid4] [raid6] [raid10]
md0 : active raid1 sda1[0]
24418688 blocks [2/1] [U_]
md1 : active raid1 sda2[0]
24418688 blocks [2/1] [U_]
unused devices:
Then power down the system:
shutdown -h now
and replace the old /dev/sdb hard drive with a new one (it must have at least the same size as the old one - if it's only a few MB smaller than the old one then rebuilding the arrays will fail).
4 Adding The New Hard Disk
After you have changed the hard disk /dev/sdb, boot the system.
Pierwszą rzeczą, którą musimy teraz zrobić, jest stworzenie dokładnie tego samego partycjonowania, co na / dev / sda. Możemy to zrobić za pomocą jednego prostego polecenia:
sfdisk -d /dev/sda | sfdisk /dev/sdb
You can run
fdisk -l
aby sprawdzić, czy oba dyski twarde mają teraz ten sam partycjonowanie.
Next we add /dev/sdb1 to /dev/md0 and /dev/sdb2 to /dev/md1:
mdadm --manage /dev/md0 --add /dev/sdb1
server1:~# mdadm --manage /dev/md0 --add /dev/sdb1
mdadm: re-added /dev/sdb1
mdadm --manage /dev/md1 --add /dev/sdb2
server1:~# mdadm --manage /dev/md1 --add /dev/sdb2
mdadm: re-added /dev/sdb2
Now both arays (/dev/md0 and /dev/md1) will be synchronized. Run
cat /proc/mdstat
to see when it's finished.
During the synchronization the output will look like this:
server1:~# cat /proc/mdstat
Personalities : [linear] [multipath] [raid0] [raid1] [raid5] [raid4] [raid6] [raid10]
md0 : active raid1 sda1[0] sdb1[1]
24418688 blocks [2/1] [U_]
[=>...................] recovery = 9.9% (2423168/24418688) finish=2.8min speed=127535K/sec
md1 : active raid1 sda2[0] sdb2[1]
24418688 blocks [2/1] [U_]
[=>...................] recovery = 6.4% (1572096/24418688) finish=1.9min speed=196512K/sec
unused devices: <none>
When the synchronization is finished, the output will look like this:
server1:~# cat /proc/mdstat
Personalities : [linear] [multipath] [raid0] [raid1] [raid5] [raid4] [raid6] [raid10]
md0 : active raid1 sda1[0] sdb1[1]
24418688 blocks [2/2] [UU]
md1 : active raid1 sda2[0] sdb2[1]
24418688 blocks [2/2] [UU]
unused devices: <none>
That's it, you have successfully replaced /dev/sdb!
How can I find out which Postfix version I'm running?
How can I find out which Postfix version I'm running?
postconf -d | grep mail_version