Systemd migration, some questions esp. rc.local

Hello
Although I'm not a fan of dzillions of config files I decided to try systemd.
Most of the things seem to work fine but some things are unclear to me:
1.) Things are working fine with rc-local.service, however I tried to make unit files for my entries in rc.local:
hdparm -B 254 /dev/sda
My unit file:
[Unit]
Description=hdparm control script
After=local-fs.target
[Service]
ExecStart=/usr/local/sbin/hdparm.sh
[Install]
WantedBy=multi-user.target
Here I'm not sure about the After=local-fs.target. AFAIU I've to make sure that /dev/sda is ready before using hdparm. I read in another thread to use After=dev-sda.device. But systemctl does not show me dev-sda.device, instead it's: sys-devices-pci0000:00-0000:00:1f.2-ata1-host0-target0:0:0-0:0:0:0-block-sda.device Should I enter this in the unit file ?
Could I enter local-fs.target instead?
2.) Then I've got a big problem with vgaswitcheroo. There seems no appropriate solution to this ? I tried to put this in a unit too, resulting in some.. well not complete crashes but very grave errors on boot...
Again, could I add After=systemd-user-sessions.service
but Before=xinit.service ?
3.) Then I use acpi_call (Yes, I used both vgaswitcheroo and acpi_call, first vgaswitcheroo then acpi_call in rc.local. I know it's doubling things but worked fine for me, after a kernel update acpi_call is not immediately availiable, AFAIK I have to recompile it first, that's when vgaswitcheroo came to it's use.) Same problem here, what should I use for After= Before etc... ?
4.) Then I've a very small script that get's started at boot and should run forever, this failed:
[Unit]
Description=brightness control script
[Service]
Type=forking
ExecStart=/usr/local/sbin/brightness.sh
[Install]
WantedBy=multi-user.target
Ok this one's not very important...
I copied rc-local.service to /etc/systemd/system. As said above everything works with this well at the moment.
Will this still work when I switch to systemd completely ?
5.) Then nfs-common.service failed:
nfs-common.service - Legacy unit for nfs-common
Loaded: loaded (/etc/rc.conf)
Active: failed (Result: exit-code) since Sun, 16 Sep 2012 22:32:04 +0200; 8s ago
Docs: man:arch-daemons(8)
Process: 1490 ExecStart=/etc/rc.d/nfs-common start (code=exited, status=1/FAILURE)
CGroup: name=systemd:/system/nfs-common.service
Sep 16 22:32:04 hplaptop nfs-common[1490]: [53B blob data]
However I can mount and unmount nfs partitions perfectly fine without it. This is a client only ! So, I don't really care about this one. In the wiki nfs it says nfs-common needs to be started, is this obsolete now ?
6.) Ah yes, same for cpufreq. This one's really not needed I think. What was it needed before ? (Ok, I saw that the wiki is in rework.)
7.) And one little thing I noticed: I use xinit.service as explained in the wiki/systemd (thanks) I copied graphical.target from lib to etc and changed Wants= from display-manager.service to xinit.service , I think that's correct ? (Did not reboot yet though..) Maybe this could be mentioned in the wiki if so.
Regards
Last edited by rebootl (2012-09-16 20:56:52)

skanky wrote:
Roken wrote:
Mine works as a one shot service - the unit loads a script which loads my server in a gnu screen session. However, the script is written to monitor various aspects of the server, and loops continuously every 30 seconds, so the script never exits.
I guess since you only need the script to run through once at startup you should be good to go, too.
Okay, that's great thanks.
Edit: meant to say, I'll give it a try.
Worked a treat. I should probably have just tried it, but I'd just spent half an hour or so getting another service file working correctly, thought it worth checking first.
Many thanks Roken.

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I have some questions regarding setting up a software RAID 0 on a Mac pro (early 2009).
These questions might seem stupid to many of you, but, as my last, in fact my one and only, computer before the Mac Pro was a IICX/4/80 running System 7.5, I am a complete novice regarding this particular matter.
A few days ago I installed a WD3000HLFS VelociRaptor 300GB in bay 1, and moved the original 640GB HD to bay 2. I now have 2 bootable internal drives, and currently I am using the VR300 as my startup disk. Instead of cloning from the original drive, I have reinstalled the Mac OS, and all my applications & software onto the VR300. Everything is backed up onto a WD SE II 2TB external drive, using Time Machine. The original 640GB has an eDrive partition, which was created some time ago using TechTool Pro 5.
The system will be used primarily for photo editing, digital imaging, and to produce colour prints up to A2 size. Some of the image files, from scanned imports of film negatives & transparencies, will be 40MB or larger. Next year I hope to buy a high resolution full frame digital SLR, which will also generate large files.
Currently I am using Apple's bundled iPhoto, Aperture 2, Photoshop Elements 8, Silverfast Ai, ColorMunki Photo, EZcolor and other applications/software. I will also be using Photoshop CS5, when it becomes available, and I will probably change over to Lightroom 3, which is currently in Beta, because I have had problems with Aperture, which, until recent upgrades (HD, RAM & graphics card) to my system, would not even load images for print. All I had was a blank preview page, and a constant, frozen "loading" message - the symbol underneath remained static, instead of revolving!
It is now possible to print images from within Aperture 2, but I am not happy with the colour fidelity, whereas it is possible to produce excellent, natural colour prints using its "minnow" sibling, iPhoto!
My intention is to buy another 3 VR300s to form a 4 drive Raid 0 array for optimum performance, and to store the original 640GB drive as an emergency bootable back-up. I would have ordered the additional VR300s already, but for the fact that there appears to have been a run on them, and currently they are out of stock at all, but the more expensive, UK resellers.
I should be most grateful to receive advice regarding the following questions:
QUESTION 1:
I have had a look at the RAID setting up facility in Disk Utility and it states: "To create a RAID set, drag disks or partitions into the list below".
If I install another 3 VR300s, can I drag all 4 of them into the "list below" box, without any risk of losing everything I have already installed on the existing VR300?
Or would I have to reinstall the OS, applications and software again?
I mention this, because one of the applications, Personal accountz, has a label on its CD wallet stating that the Licence Key can only be used once, and I have already used it when I installed it on the existing VR300.
QUESTION 2:
I understand that the failure of just one drive will result in all the data in a Raid 0 array being lost.
Does this mean that I would not be able to boot up from the 4 drive array in that scenario?
Even so, it would be worth the risk to gain the optimum performance provide by Raid 0 over the other RAID setup options, and, in addition to the SE II, I will probably back up all my image files onto a portable drive as an additional precaution.
QUESTION 3:
Is it possible to create an eDrive partition, using TechTool Pro 5, on the VR300 in bay !?
Or would this not be of any use anyway, in the event of a single drive failure?
QUESTION 4:
Would there be a significant increase in performance using a 4 x VR300 drive RAID 0 array, compared to only 2 or 3 drives?
QUESTION 5:
If I used a 3 x VR300 RAID 0 array, and installed either a cloned VR300 or the original 640GB HD in bay 4, and I left the Startup Disk in System Preferences unlocked, would the system boot up automatically from the 4th. drive in the event of a single drive failure in the 3 drive RAID 0 array which had been selected for startup?
Apologies if these seem stupid questions, but I am trying to determine the best option without foregoing optimum performance.

Well said.
Steps to set up RAID
Setting up a RAID array in Mac OS X is part of the installation process. This procedure assumes that you have already installed Mac OS 10.1 and the hard drive subsystem (two hard drives and a PCI controller card, for example) that RAID will be implemented on. Follow these steps:
1. Open Disk Utility (/Applications/Utilities).
2. When the disks appear in the pane on the left, select the disks you wish to be in the array and drag them to the disk panel.
3. Choose Stripe or Mirror from the RAID Scheme pop-up menu.
4. Name the RAID set.
5. Choose a volume format. The size of the array will be automatically determined based on what you selected.
6. Click Create.
Recovering from a hard drive failure on a mirrored array
1. Open Disk Utility in (/Applications/Utilities).
2. Click the RAID tab. If an issue has occurred, a dialog box will appear that describes it.
3. If an issue with the disk is indicated, click Rebuild.
4. If Rebuild does not work, shut down the computer and replace the damaged hard disk.
5. Repeat steps 1 and 2.
6. Drag the icon of the new disk on top of that of the removed disk.
7. Click Rebuild.
http://support.apple.com/kb/HT2559
Drive A + B = VOLUME ONE
Drive C + D = VOLUME TWO
What you put on those volumes is of course up to you and easy to do.
A system really only needs to be backed up "as needed" like before you add or update or install anything.
/Users can be backed up hourly, daily, weekly schedule
Media files as needed.
Things that hurt performance:
Page outs
Spotlight - disable this for boot drive and 'scratch'
SCRATCH: Temporary space; erased between projects and steps.
http://en.wikipedia.org/wiki/StandardRAIDlevels
(normally I'd link to Wikipedia but I can't load right now)
Disk drives are the slowest component, so tackling that has always made sense. Easy way to make a difference. More RAM only if it will be of value and used. Same with more/faster processors, or graphic card.
To help understand and configure your 2009 Nehalem Mac Pro:
http://arstechnica.com/apple/reviews/2009/04/266ghz-8-core-mac-pro-review.ars/1
http://macperformanceguide.com/
http://www.macgurus.com/guides/storageaccelguide.php
http://www.macintouch.com/readerreports/harddrives/index.html
http://macperformanceguide.com/OptimizingPhotoshop-Configuration.html
http://kb2.adobe.com/cps/404/kb404440.html

Some questions about configuration in MAX.

Hello,everyone!
I have some questions about configuration in MAX(I am a jackaroo for motion control development),I hope I can get your help.
I use PCI-7344+UMI-7764+Servo amplifier+Servo motor,my MAX version is 4.2 and I use NI-Motion7.5
My question as following:
1,In Axis Configuration,for motor type,why I must select stepper but not servo?my motor is servo motor!If I select Servo,my motor can't run,I don't know why.
If I select stepper,though motor can work but I can't test encoder in MAX.
2,In Stepper settings,for stepper loop mode,why I must select open-loop but not close-loop?If I select close-loop,the servo motor doesn't work too.
3,If I want my two servo motors run at different velocity,How shoud I do?It seems I just can set the same velocity in MAX for my two servo motors.
My English is poor,Pls pardon me!I come from China.
Thank you for your help!
EnquanLi
Striving is without limit!

Hi,Jochen,
Thank you for your kindly help!
The manufacturer of the drive and motor that I am using now is Japan SANYO DENKI,drive type is RS1A01AA,motor type is R2AA06020FXP00.
And I use position control mode,thehe encoder's counts per revolution is 131072.I set the electronic gear ratio to 1:1 for drive.
Now,I can use Close-Loop to control the motor but still has some problems.When I configure it to run in closed loop mode, the motors behave strangely and never move to the target position.When I configure it to run in closed loop mode, the motors behave strangely and never move to the target position.The detail situation is as following
1,Motor can't run.
2, Or motor moves to a position, then moves in the same direction agian and eventually stops.
Except for the two points mentioned above,"Following Error" is occured frequently,I don't know why.
I am still not clear why I must set the motor type be stepper in MAX .
And I have another question:what the relationship between the steps and the counts?They have the proportion relations?I notice that there are a section said like this in help document: For proper closed-loop and p-command operation, steps per revolution/counts per revolution must be in the range of 1/32,767 < steps/counts < 32,767. An incorrect counts to steps ratio can result in failure to reach the target position and erroneous closed-loop stepper operation.
I am verry sorry I have too many questions!
I am very appreciate for your kingly help!Thanks again!
EnquanLi
China
Striving is without limit!

Some Questions on Adobe PDF Forms

Hi,
I have some questions on Adobe Forms development (especially Adobe Forms in ABAP)
1)     In a form interface, in the Code Initialization can we use Object Oriented Syntaxes such as class method calls, etc?
2)     Can we declare Global Data variables with reference to Class References / Interfaces
3)     Can we use the latest ECC 6.0 enhancement framework to add code in the standard form interface to enhance / enrich some logic within the form? This is to avoid copying the form interface into a Z in order to enrich the form via coding?
Please let me know if this is possible at all and how
Will award points
Thanking You in advance
Regards,
Aditya

That is possible of course. You should use the PDFObject API for that requirements.
1. define a xml schema with all data given by SAP system.
2. create a form template which uses this schema as data connection
3. implement a java application (i.e. J2EE application) which:
- gets the data from SAP system and generates some pdf files (using PDFObject API)
- reads pdf files back to xml and submits the data to a BAPI
Regards
Sebastian

Some questions on whitespace and &

Dear all,
I have some questions on whitespace and & that need you kind help:
1. Except /n /t /r and space, is there any characters that are whiteSpace characters?
2. When parsing XML document, when the ignorableWhitespace() method is called? Will it be called from characters() ?
e.g. Where the white space after <a> is called, and where is the white space between test1 and test 2 indied is called?
<a>
 test1 test2
</a> 3. When the & should be escaped in a well-formed (or validated) XML file by replacing &?
It should be excaped in any element content, such as test1 & test2 - except for <![CDATA[ section?
It should NOT always be used in attributes? e.g. <a b="test1 & test2"/> - has to do escaped by entity & - am I right?
Thanks!
Thanks


Thanks DrClap.
>
2. When parsing XML document, when the
ignorableWhitespace() method is called? Will it be
called from characters() ?It will be called when the document has a DTD and the
parser is a validating one that is actually
validating, when the parser sees whitespace that is
not part of a DTD element. It will not be called from
characters() because that is a method that you write.I wrote a contentHandler and using Xerces parser to parse an XML document. When I set validating feature to false, I found that for:
<a>
 test1 test2</a>The white space between <a> and (including newline) is actually called from characters(), not in ignorableWhitespace(). So does this mean that if validating - white space is always called from ignorableWhitespace(), and if not validating, if it is always called from characters()?
>
3. When the & should be escaped in a well-formed(or
validated) XML file by replacing &? The XML Recommendation says "The ampersand character
(&) and the left angle bracket (<) may appear
in their literal form only when used as markup
delimiters, or within a comment, a processing
instruction, or a CDATA section. If they are needed
elsewhere, they must be escaped using either numeric
character references or the strings "&" and
"<" respectively."So in this sense, both & in test1 & test2 and <a b="test1 & test2"/> is illegal unless replacing them by & - right? What does the markup delimiters mena in above XML Recommendation ? Example?
Thanks!

Systemd migration, some questions esp. rc.local

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