Why would you ever use asp.net’s ViewState storage object over the Session storage object?
Other than because session storage is session-global to more than one page, why would you ever want to use the viewstate to hold values?
storage
Replicating an SD card
Mon Jun 3 17:53:18 EDT 2019
[sudo] password for user:
Mon Jun 3 23:42:17 EDT 2019
-bash: /usr/sbin/useradd: Input/output error — What does this mean?
Today, on my Centos server I tried to add a user but got the following error:
How can I use DD to migrate data from an old drive to a new drive?
I am upgrading the internal SATA hard drive on my laptop from a 40G drive to a 160G drive. I have a Linux/Ubuntu desktop which has a SATA card. I would actually like to do the same thing for a couple CentOS & FreeBSD boxes at work, and it seems this would have the same solution.
How do pdflush, kjournald, swapd, etc interoperate?
Recently saw a question that sparked this thought. Couldn’t really find an answer here or via the Google machine. Basically, I’m interested in knowing how the kernel I/O architecture is layered. For example, does kjournald dispatch to pdflush or the other way around? My assumption is that pdflush (being more generic to mass storage I/O) would sit at a lower level and trigger the SCSI/ATA/whatever commands necessary to actually perform the writes, and kjournald handles higher level filesystem data structures before writing. I could see it the other way around as well, though, with kjournald directly interfacing with the filesystem data structures and pdflush waking up every now and then to write dirty pagecache pages to the device through kjournald. It’s also possible that the two don’t interact at all for some other reason.
Convert a single-drive LVM volume to a striped volume across 3 drives
On my server using LVM, I have a simple linear LV on a single drive (PV). Now, I added 2 more (same size) drives (PVs) to the server.