hfs-user

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183 discussions

Re: [hfs-user] To make a Readonly HFS Volume
by Entwicklung 26 Apr '02

26 Apr '02

Are you sure you've set drAtrb to 0 first before OR-ing 0x8000 with it ? Or are you just setting mdb.drAtrb = 0x8000 instead of : 1) mdb.drAtrb = 0x0000; 2) mdb.drAtrb | = 0x8000 ; Stt 2) without stt 1) might result in some unknown value getting written. -Nandini ----- Original Message ----- From: "Biswaroop(External)" <biswaroopb(a)integramicro.com> To: "Entwicklung" <entwicklung(a)whengenibk.de> Sent: Friday, April 26, 2002 2:05 PM Subject: Re: [hfs-user] To make a Readonly HFS Volume > Hi Nandini, > Thanks for a Quick Reply. > But I did that too..but no success. > regrds > Biswaroop > ----- Original Message ----- > From: "Entwicklung" <entwicklung(a)whengenibk.de> > To: "Biswaroop(External)" <biswaroopb(a)integramicro.com> > Cc: <hfs-user(a)lists.mars.org> > Sent: Friday, April 26, 2002 5:08 PM > Subject: Re: [hfs-user] To make a Readonly HFS Volume > > > > Wouldn't setting bit 15 give 0x8000 ??? numbering the 16 bits from 0..15 > > i.e. > > > > - Nandini > > > > ----- Original Message ----- > > From: "Biswaroop(External)" <biswaroopb(a)integramicro.com> > > To: <hfs-user(a)lists.mars.org> > > Sent: Friday, April 26, 2002 1:17 PM > > Subject: [hfs-user] To make a Readonly HFS Volume > > > > > > > Hi , > > > > > > I want to make a HFS volume readonly. > > > I am setting the flag in mdb.drAtrb to > > > > > > mdb.drAtrb | = 0x4000 ( As said in Inside Macintosh) > > > > > > Bit Meaning > > > 15 Set if th volume is Locked by Software. > > > > > > After creating a Image of such a Volume. > > > I am mounting it with a FreeWare application in Windows which can mount > > HFS > > > volumes. > > > But , I can still add files to that volume through this > > > software and delete them too. > > > That shows the volume is not Locked. > > > So, anything else I should do to Volume parameters > > > to make that Volume represent a ReadOnly one?? > > > > > > Waiting for ur Inputs. > > > > > > Regards > > > Biswaroop > > > > > > > > > > > > > > > > > > > > > > > > > > > The difference between sunrise and > > > sunset lies in the freshness of your > > > eyes. > > > --Bisban

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To make a Readonly HFS Volume
by Biswaroop(External) 26 Apr '02

26 Apr '02

Hi , I want to make a HFS volume readonly. I am setting the flag in mdb.drAtrb to mdb.drAtrb | = 0x4000 ( As said in Inside Macintosh) Bit Meaning 15 Set if th volume is Locked by Software. After creating a Image of such a Volume. I am mounting it with a FreeWare application in Windows which can mount HFS volumes. But , I can still add files to that volume through this software and delete them too. That shows the volume is not Locked. So, anything else I should do to Volume parameters to make that Volume represent a ReadOnly one?? Waiting for ur Inputs. Regards Biswaroop The difference between sunrise and sunset lies in the freshness of your eyes. --Bisban

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Desktop View
by Entwicklung 25 Apr '02

25 Apr '02

Hello, I need some help. I'd like to know what part of the HFS format is responsible for how icons on an external CD-volume appear on the desktop of Mac OS 9. The desktop database holds the icon info but where is info. like Window-sizing on the Mac, no. of icons per row, spacing of icons etc. stored ? Is this stored on the hard-disk of the Mac or is there some way in which I can get this to be stored on my CD as well ? Is this part of the desktop database too ? The situation is as follows - when I insert my HFS-CD into my drive and click on the CD-symbol a window opens up displaying the icons for all the files present on the CD but they are not spaced properly and the view doesn't look all that good - Is there some way in which I can display these properly ? ..ie. say 'n' icons in one row etc ? Sometimes there are around 30 icons displayed for around 100 files on my CD... then a lot of empty space is displayed - which could mislead the user to think that no more files are present - and then the remaining 70 file-icons suddenly show up. I presume this doesn't have to be stored on the external HFS-volume but rather has something to do with my Mac-OS settings... but I'm not too sure. I'd appreciate it if someone could tell me which part is responsible for such things ? I'm not creating a desktop DB at the moment but this looks really bad and I'd like to change it if I can i.e. if this can be overcome somehow without having a desktop database on my CD. TIA, Nandini ********** It's not easy to find happiness in ourselves and it's not possible to find it elsewhere ************

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Fw: [hfs-user] (no subject)
by Entwicklung 23 Apr '02

23 Apr '02

----- Original Message ----- From: "Entwicklung" <Entwicklung(a)WHengenIBK.de> To: "Biswaroop(External)" <biswaroopb(a)integramicro.com> Sent: Tuesday, April 23, 2002 9:37 AM Subject: Re: [hfs-user] (no subject) > Hi Biswaroop, > It's (2^16 -1)*(2^32 - 1) - since in a 2s-complement > representation n-bytes(unsigned) can store a maximum positive value of > (2^n - 1). This is also why the maximum no. of allocation blocks is 65535 > and not 65536(2^16) since otherwise it would result in an overflow. Signed > integers - SInt8 for eg. can hold values ranging from -128 (-2^(n-1)) to +127 > (2^(n-1) - 1). > > Hope this helps ! > > Regards, > Nandini > > ----- Original Message ----- > From: "Biswaroop(External)" <biswaroopb(a)integramicro.com> > To: <hfs-user(a)lists.mars.org> > Sent: Tuesday, April 23, 2002 8:53 AM > Subject: [hfs-user] (no subject) > > > > Hi all, > > > > I am just wondering about the Max Volume size for a > > HFS volume. > > Theretically > > it should be.. > > 2^16 * 2^32(it is a multiple of 512)= 2^48 > > 2^30 = 1GB > > Therefore > > 2^18 GB is the maximum.(Isn't it??) > > > > regards > > Biswaroop > > > > > > > > The difference between sunrise and > > sunset lies in the freshness of your > > eyes. > > --Bisban >

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(no subject)
by Biswaroop(External) 23 Apr '02

23 Apr '02

Hi all, I am just wondering about the Max Volume size for a HFS volume. Theretically it should be.. 2^16 * 2^32(it is a multiple of 512)= 2^48 2^30 = 1GB Therefore 2^18 GB is the maximum.(Isn't it??) regards Biswaroop The difference between sunrise and sunset lies in the freshness of your eyes. --Bisban

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HFS Maximum Image Size
by Entwicklung 23 Apr '02

23 Apr '02

Hello Listers, The maximum size of an HFS-volume seems to be 65535*65535 = 3.99 GB. (since the respective fields in the MDB are UInt16's). Does this mean that to store a file of size 4.7GB I would have to necessarily go in for HFS+ or is this possible with HFS somehow ? Regards, Nandini Hengen

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Re: pdf files on Mac-OS 9
by Entwicklung 20 Apr '02

20 Apr '02

Hello, My problem is solved now ... I realised it had to have something to do with the folder threads - i.e. that the thread records didn't maintain correct references to the folders.... was quite a silly error actually .... the nodename[0] field which holds the length of the nodename (in the folder and its thread didn't correspond to each other due to a small bug in my program) ... so though the file and the icon got displayed correctly and the data could be accessed, acrobat apparently tries relocating its way down the tree starting from root. One surprising thing I noticed is that I didn't have this problem for jpg files - probably the graphics application which is launched on Mac OS functions slightly differently as compared to Acrobat..... dunno in what way although...good news is it works now anyway ! Regards, Nandini Hengen ----- Original Message ----- From: "Steve Sisak" <sgs-lists(a)codewell.com> To: "Entwicklung" <entwicklung(a)whengenibk.de>; <darwin-development(a)lists.apple.com> Sent: Friday, April 19, 2002 2:14 PM Subject: Re: pdf files on Mac-OS 9 > At 1:23 PM +0200 4/19/02, Entwicklung wrote: > >What could this be due to ? Could this be some problem with the filesystem > >format or does it rather have to do with Acrobat Reader for Mac OS? > > This is not a Darwin issue, but it's probably that the HFS file type > is not set to and therefor the file can't be opened by Acrobat > because it isn't recognized as a PDF file. > > When you copy the file, PC File Exchange treats it as a Non-Mac file > (because the type isn't set) and applies a type/creator based on the > file's extension which allows the copy to be opened by Acrobat -- it > probably doesn't matter where you copy. > > (Note that the creator is not important, but most pre-X Mac > applications will not open a file with an incorrect type -- > extensions have no significance pre-X) > > -Steve > _______________________________________________ > darwin-development mailing list | darwin-development(a)lists.apple.com > Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-development > Do not post admin requests to the list. They will be ignored.

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pdf files on Mac-OS 9
by Entwicklung 19 Apr '02

19 Apr '02

Hello Listers, I have a CD-Volume (HFS) with two levels of files in a directory i.e. at the topmost level (under root) and inside a directory present in root. The same pdf file when present at the higher level is readable directly from the CD but the file present within the directory is not. This problem arises only for Acrobat reader documents.. it works fine for text fíles.... besides dragging and droppping these lower level files onto my desktop from the CD enables me to read them as required. What could this be due to ? Could this be some problem with the filesystem format or does it rather have to do with Acrobat Reader for Mac OS? Any tips would be appreciated. Regards, Nandini Hengen

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Help needed...
by Entwicklung 18 Apr '02

18 Apr '02

Hello listers, I've encountered a problem in my HFS directory structure which I have tried to elaborate below... please do take a look at it and see if some plausible reason strikes you. I have a file File-X say under Root. Under Root I also have a folder Folder-X inside which I have another file of the same name i.e. File-X and another file File-Y. File-X is a pdf file of size 42MB and File-Y is a simple text file only 4kB in size. All icons get correctly displayed from my CD so I presume all the leaf nodes of my catalog B-Tree are getting iterated through (since the icons get set based on the filetype and creator fields). The problem I'm facing is that File-Y (within Folder-X) is readable, File-X under Root is readable but when I try to open File-X which is under Folder-X Acrobat seems to go into sleep mode. What could this possible be due to ? I first thought the references maintained to the file extents (or file size) was wrong... but it seems to be right... the start block as well as the block count (in the leaf nodes) seem to be all right... what else could cause the icon to get displayed but not allow the file to be opened ? - The file is correctly written (twice at two different locations) and readable the first time. - The start-block and block count seems to be right for both. - Another file written at the same level is readable. Could it have something to do with the size of the file ? Please help if you have any idea what could be causing this.. Regards, Nandini Hengen

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HFS+ volumes : kHFSVolumeUnmountedBit
by Entwicklung 18 Apr '02

18 Apr '02

Hello Listers, The HFS+ tech. notes say that the 'Volume attributes' field in the volume header has to have Bit 8 set to 1 if the volume was correctly flushed when it was mounted or ejected the last time. It also mentions that if this is not done it could take an annoyingly long time for the ROM-based consistency check (on Mac OS 7.6 and higher) for boot volumes. 1) My volume is not a boot volume. 2) I have cleared this bit - set it to 0 3) Inspite of 1) and 2) a smaller HFS+ volume with only one index node = root gets mounted pretty fast. 4) A larger HFS+ volume (2 levels of index nodes) doesn't get mounted at all... my iMac with MacOS 9 just hangs altogether..... I have to remove my CD by force and restart. I assumed this couldn't be an error in the catalog but has something to do with the Volume Header since I would have expected to see an error dialog instead. Besides this seems to be HFS+ specific since I never encountered this kind of problem with HFS. Does anyone know what this could be due to ? Any suggestions/comments would be greatly appreciated. Regards, Nandini Hengen

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