To select correct SD card for correct task, SD card speed is important.
Although SD card is not a sequential writing device, but it is still has fragmentation issue.
SD Standard for Video Recording
Introduction to SD Card Classes and Speeds
A guide to speed classes for SD and microSD Cards
Got buzzing noise from top left corner, and very hard to turn on, power button may or may not response.
The fan noise also comes from bottom right corner, thinking to replace a new one.
The power button got issue long ago, sometimes can not work, sometimes can. I think after disconnected from power, maybe will be ok later. I thought it could be bottom connection issue.
After moved iMac into a quiet room, I heard buzzing noise from top left corner, I started believe the power supply got issue.
Replace power supply later together with fan.
IMAC Buzzing Noise From Top Left Corner FIXED!! / Replace Power Supply
In Synology, move share folder to another volume is quite easy, can be done via UI interface. In TrueNAS, I could not find such task can be selected.
The workable solution is utilize the zfs command to duplicate in SSH environment, then export old pool and import new one.
First make a snapshot poolX/dataset@initial, then use following command duplicate zfs dataset snapshot to new zpool.
zfs send poolX/dataset@initial | zfs recv -F poolY/datasetThen make another snapshot poolX/dataset@incremental, then use following command update zfs dataset snapshot to new zpool.
zfs send -i initial poolX/dataset@incremental | zfs recv poolY/datasetTo make the new dataset usable, rollback snapshot needs to be performed for new dataset.
Change shared point to use new pool.
This is only required if client used server filesystem structure, such as NFS.
Migrate to smaller disk
*Note: pv (Pipe Viewer) command is not installed in TrueNAS by default.
Got following error when trying to replace hard disk in zpool. Reboot is required.
middlewared.service_exception.CallError: [EFAULT] Partition type 6a898cc3-1dd2-11b2-99a6-080020736631 not found on sdaFirst issue with the partition which exists in the old hard disk. Use fdisk to remove all partitions. But still could not replace.
Then click on force check box, the replacing was started, but stopped at 15%. Tried many times, but still failed. Search google, people got same issue, but they said sudden worked.
Run partprob, error shows the kernel didn't know the new partition table, reboot is required.
After reboot, checked partition table, found TrueNAS had updated partition as others, which has one 2GB swap. Then force replace hard disk in pool again, then worked
This is TrueNAS bug, which didn't close devices in kernel before repartition hard disk, this caused partition is opened and could not reread the new partition table into kernel.
Reboot
Cant create Pool on TrueNAS Scale (it does work on TrueNAS Core under same Hardware)
Cant create Pool on TrueNas Scale
During Chef Server troubleshooting time, found chef is unreachable from localhost
chef-server-ctl status command, pid could be foundps -ef | grep nginx, found nginx is running without indication of masternginx command line which found in psCan not find IP address, then add IP and host into /etc/host file, result shows
master indicatorStill can not reach upstream server
The problem could be related to following issues caused application stopped due to no IP can be found for upstream servers.
These commands might not workable in some Unix like systems.
netstat -ltnp
netstat -peanutlsof -i :80fuser 80/tcp
ss -nlp
``
## References
[3 Ways to Find Out Which Process Listening on a Particular Port](https://www.tecmint.com/find-out-which-process-listening-on-a-particular-port/)In recent post list, the date of sorting is based on published date, so the updates will never be shown. To change this behavior, following code can be appended into functions.php to archive the sorting by last updated date.
function lmt_orderby_modified_posts( $query ) {
if( $query->is_main_query() && !is_admin() ) {
if ( $query->is_home() || $query->is_category() || $query->is_tag() ) {
$query->set( 'orderby', 'modified' );
$query->set( 'order', 'desc' );
}
}
}
add_action( 'pre_get_posts', 'lmt_orderby_modified_posts' );There is an issue after changed sorting and modified post day, the archives will still be under published date, which can be comfusing.
If there is a way change permalink structure based on last updated date, then could be much simple.
Sort posts by modified date in the frontend
Using Permalinks
Simple Guide to Changing Your Permalinks Without Breaking Your WordPress Site
There are a few methods to display last updated in WordPress
But default, post date is published date, if like to change it to last updated date, add additional CSS as below.
/* for post modified */
.entry-date.published { display: none; }
.updated:not(.published) { display: inline-block; }
/* for post that never been modified, theme uses .updated */
.entry-date.published.updated { display: inline-block; }function my_last_updated_date( $content ) {
$u_time = get_the_time('U');
$u_modified_time = get_the_modified_time('U');
if ($u_modified_time >= $u_time + 86400) {
$updated_date = get_the_modified_time('F jS, Y');
$updated_time = get_the_modified_time('h:i a');
$custom_content .= '<p class="last-updated entry-meta">Last updated on '. $updated_date . ' at '. $updated_time .'</p>';
}
$custom_content .= $content;
return $custom_content;
}
add_filter( 'the_content', 'my_last_updated_date' );This is the PHP way to modify the code to display dates.
In order to reinstall OS, I searched Internet, and no one tell the truth, let me spent a few hours. I'm also not sure my method will work later or not. Need to think a way to create local bootable disk.
I don't have wired apple keyboard and mouse, so used Windows keyboard. It doesn't have Command key, but searching internet, found the Intel iMac can use Command or Alt. Yes, Alt works, can display boot option.
After a few relocation, I could not find the installation CD, it is at least hard to find, decided to create an installation USB.
My new iMac mini has OS Big Sur, I tried methods given by Apple, none of them can work.
I created Big Sur bootable USB, but when tried to install, gave me stop sign.
I tried to click the links to download old MacOS from Apple, they don't work at all.
I tried to download OS image from other website, they can not be executed and run Apple given command, because they are for different OS.
I tried use Daemon Tools to create bootable USB from dmg file, in fact, not working.
When I kept finding methods to create bootable image, suddenly, the iMac display installation utilities after boot, which means installation can be continue without installation media, this is good feature of iMac.
Got funny issue, can not detect my SSD, I thought the SATA connection issue. Open it and reconnected it, tested on external USB, suddenly found the disk can be detected by Disk Utility. Then thought again, noticed that the disk needs to be erased.
After installation completed, it is running Mount Lion, very old OS, then App Store update got issue, can not update software patch.
After search internet, found High Sierra can be installed, then clicked on Apple OS installation link which was work before, it works.
Not completed, there are quite number of patches to be installed, although take long time, the actual installation time reported by installation process is much longer, about 15 mintues reduced to two or three minutes, this is the benefit of SSD disk.
To avoid spending too much time next time, I decided to create installation media image and perform backup.
After opened time machine disk selection window, the AFP enabled NAS immediately appear, but not the SMB only NAS. Manual mapping/accessing of disk is required before Time machine could see it.
El Capitan:
sudo /Applications/Install\ OS\ X\ El\ Capitan.app/Contents/Resources/createinstallmedia -
The commands are given by Apple as below for media creation.
Beware: They can not work with OS which is different than current.
Big Sur:*
sudo /Applications/Install\ macOS\ Big\ Sur.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolumeCatalina:*
sudo /Applications/Install\ macOS\ Catalina.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolumeMojave:*
sudo /Applications/Install\ macOS\ Mojave.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolumeHigh Sierra:*
sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolumeWhen open web developement tools in web browser, followning error could appear.
Source map error: request failed with status 404
Resource URL: https://domainname.com/.../bootstrap.css?ver=4.4.1
Source Map URL: bootstrap.css.map
This file can be download from bootstrap web page Bootstrap v4.4.1, and put it into same folder as bootstrap.css.
Remove comments like /# sourceMappingURL=bootstrap.min.css.map / in bootstrap.min.css, bootstrap.min.js.
Source map files are generated automatically during files minification/compiling process, and they are not needed for the production.