hfs-user February 2002

hfs-user@lists.mars.org

10 participants
15 discussions

Partition and Boot block Structures in a HFS CD image
by Biswaroop Banerjee 26 Feb '02

26 Feb '02

Hi all, Can anybody give me a judgement?? If i am creating a file which contains a HFS filesystem image which will be then written to a CD. THis image is not a Bootable Cd so should the file contain partition and boot block structures. Should i just write "zeros" in the first two sectors of the image (i.e. 512 *2 = 1024 bytes) in the file, and then write down the MDB structure in the image file after 1024 bytes?? Waiting for replies.. regards Biswaroop Banerjee

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Request for Comments on HFS or HFS+ on a Hybrid CD/DVD
by Biswaroop Banerjee 25 Feb '02

25 Feb '02

Hi Everybody, Going through the few last topics discussed I want to know whether an implementation of a HFS filesystem would be the right choice on a CD. According to my understanding a CD can contain 650 Mb of data so we wont have problems in making that volume HFS like rather than HFS+. But if the same is used for a Single sided DVD which gives 4.7 GB of space ; whether HFS would be the choice or i should go for HFS+. Another question is do any of u know about any premastering application which supports " HYBRID DVD". Waiting for ur comments. Biswaroop Banerjee p.s. Yeah i have also received mails from "ABUSE" i also replied to them for changing atleast their "abusive" name

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Curious about the current interest in HFS ...
by James Pearson 25 Feb '02

25 Feb '02

Having had virtually no traffic on this list for ages, over the past few weeks or so, there seems to have been a rush of interest in HFS/HFS+ ... I'm just curious to as why ... I must admit that I haven't really kept up to date with more 'recent' Apple developments (HFS+, MacOS X, etc), but I had assumed that as MacOS X doesn't actually need the 'extras' HFS+ supplies, then HFS+ would eventually disappear. May be my assumption is a bit naive, but especially for writing CDs for Macs on non-Mac platforms, creating a Rock Ridge/Joliet CD is much easier than an HFS or HFS hybrid CD ... James Pearson P.S. does anyone else that posts to this list get a reply from "<abuse(a)microsoft.com>" ...

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Microsoft abuse responses
by Rob Leslie 25 Feb '02

25 Feb '02

Regarding the responses from <abuse(a)microsoft.com>: It seems one of our subscribers was automatically forwarding messages from this list. I've taken suggested measures to prevent this from continuing. Hopefully the problem will end here, but there may still be a few messages in the queue. If anyone still receives responses from <abuse(a)microsoft.com> as a result of posting to this list, please either ignore them or forward them to me directly. Thanks for everyone's understanding. -- Rob Leslie rob(a)mars.org

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Fw: [hfs-user] Curious about the current interest in HFS ...
by Entwicklung 24 Feb '02

24 Feb '02

----- Original Message ----- From: "Abuse at Microsoft" <abuse(a)microsoft.com> To: "Entwicklung" <entwicklung(a)whengenibk.de> Sent: Sunday, February 24, 2002 1:51 PM Subject: Re: [hfs-user] Curious about the current interest in HFS ... Hello, Thank you for contacting Microsoft. We appreciate the information you have provided thus far. Though you may have provided some of this information already, we will need more information to create a case. Please assist us in further processing your support request by providing the following information in an e-mail message to Msupport(a)microsoft.com: * Product name, version and Product Identification Number (PID) * Operating system and version (For example: Windows XP) * Browser type and version * Memory (RAM) * CPU type and speed * Complete error messages * Specifics of the problem * All Contact Information (Name, e-mail address, and telephone number) For help locating the Product Identification Number (PID), go to: http://support.microsoft.com/support/webresponse/pid/pidfind.asp If you have any additional questions, please let us know by replying to this message. Thank you, Justin Microsoft Online Customer Representative ------------------------ From: entwicklung(a)whengenibk.de Received: 2/24/02 4:14 AM To: Abuse at Microsoft Subject: Re: [hfs-user] Curious about the current interest in HFS ... Original Message Follows: ------------------------- I'm a student working part-time on a filesystems project and was just given an outline of the project requirements to start off. I enrolled myself as part of the student-dev and darwin-development mailing lists but the topics discussed there are not really relevant to my requirements... besides I end up getting more than a 100 mails from these which I can't really use purposefully. I'm glad that people have slowly started responding on this list and that a healthy discussion of issues seems to have begun.... as compared to the other apple mailing-lists I had begun to assume that this list was pretty much in hibernation :) > May be my assumption is a bit naive, but especially for writing CDs for > Macs on non-Mac platforms, creating a Rock Ridge/Joliet CD is much easier > than an HFS or HFS hybrid CD ... I'm not too sure but do older Macs support Roc Ridge/Joliet too? I'm sure there aren't too many people using older Macs but maybe this has to to do with making things easier for them (?) > P.S. does anyone else that posts to this list get a reply from > "<abuse(a)microsoft.com>" ... Aargh!...don't tell me they're mailing you too!....I don't intend to contact Microsoft (by no means!) but their mails always begin with a 'Thank you for contacting Microsoft...." ...maybe they don't know they're part of this list ? Besides if they're offering constructive suggestions we should be hearing from 'support' not 'abuse' I think. I wrote to them about this once and it doesn't seem to have made any difference. Regards, Nandini

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Desktop Database
by Entwicklung 23 Feb '02

23 Feb '02

Hi, Could someone tell me where exactly to find some documentation on the desktop DB for an external HFS volume? I came across some interesting info on Thomas Tempelmann's developer's site and it said that one would have to request Apple for further technical info (?!) but the website didn't really furnish the kind of details I need. I basically need info. as to how and where exactly (in the image) this file has to be present and what its exact contents (structure) are...links to any sample code, open sources or headers related to this would be greatly appreciated. The technical notes for HFS+ and the related documentation for HFS volumes (part of Inside Macintosh) don't seem to contain elaborate info on this either. Regards, Nandini Hengen PS. Thanks to everybody who replied to my previous mail on 'embedded volumes'.... I've come to the conclusion I'll need one after all.....at least at a later stage (once I start dealing with HFS+) to ensure that my CD-RW HFS+ volumes don't get erased on earlier Macs...

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Embedded volume..
by Entwicklung 23 Feb '02

23 Feb '02

Hi, what exactly does the term embedded volume mean? I've noticed that the HFS MDB has some fields related to this but the HFS+ volume header doesn't seem to. I'm not really using these fields but I'd like to know what they're used for in any case. So if anyone could enlighten me I'd appreciate it. Regards, Nandini Hengen

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HFS under DOS
by Simon Bazley 22 Feb '02

22 Feb '02

There is a standard layout that a mac uses on a DOS floppy, so that it can support all the AppleDouble files and all the rest. Can someone tell me where its documented. I want to know how HFS+ should look when its mounted on a system that doesn't support forks. Simon

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Re: [hfs-user] Embedded volume..
by Entwicklung 22 Feb '02

22 Feb '02

Oops ...sorry! the second field was meant to be drEmbedExtent... wrote that in a hurry! -Nandini ----- Original Message ----- From: "Entwicklung" <Entwicklung(a)WHengenIBK.de> To: "Simon Bazley" <sibaz(a)sibaz.com> Cc: <hfs-user(a)lists.mars.org> Sent: Friday, February 22, 2002 3:05 PM Subject: Re: [hfs-user] Embedded volume.. > Hello, > Thanks for replying... was hoping that someone would respond! > > I was referring to the fields: > UInt16 drEmbedSigWord ;//embedded volume signature - formerly drVCSize > and HFSExtentDescriptor drEmbedSigWord ;//embedded volume location and > size - formerly drVBMCSize and drCtlCSize > > I think what you mentioned about Wrappers is relevant to what I wanted to > know though I don't see the purpose of having a HFS+ partition embedded in a > HFS volume (?). Why would anyone want an embedded partition when all data > could be stored in the original HFS partition? I've just set these fields to > 0 right now and I fail to see a situation where I (a third-party HFS-volume > developer) would ever need these. > Any tips? > > Regards, > Nandini Hengen > > ----- Original Message ----- > From: "Simon Bazley" <sibaz(a)sibaz.com> > To: "Entwicklung" <entwicklung(a)whengenibk.de> > Cc: <hfs-user(a)lists.mars.org> > Sent: Friday, February 22, 2002 2:51 PM > Subject: Re: [hfs-user] Embedded volume.. > > > > I'm not sure exactly what you're referring to, but heres a few pointers. > > > > The volume is the thing that you mount on your computer which provides > > files. It represents the single mount point which appears as a disk on > > your computer. > > The HFS Wrapper is a HFS partition consisting of a massive consecutive > > bad block file, which happens to be a HFS+ partition thats embedded in > > the HFS volume. > > The important difference between HFS+ and HFS is that wheras in HFS > > certain files (Device Drivers, Boot System Files, Allocation Bitmap) > > exist at various physical disk locations (sector 0, sector, sector 4 > > etc) and the MDB only gives the location to the Catalog and Extent > > files. Also there are 2 different address spaces, physical (in > > sectors), and logical (in blocks, starting at 0, after the end of the > > volume bitmap, at the location described in the MDB as the start of free > > space). HFS+ has very little (if any) system files at fixed locations, > > and everything is referred to in the volume descriptor (replaces the > > MDB), in the way the Catalog and Extent files was before. > > > > Hope that explains everything, if not give me the names of the variable > > in the HFS and HFS+ volume descriptors and I'll explain what they mean. > > > > Simon > > > > Entwicklung wrote: > > > > > Hi, what exactly does the term embedded volume mean? I've noticed > > > that the HFS MDB has some fields related to this but the HFS+ volume > > > header doesn't seem to. I'm not really using these fields but I'd like > > > to know what they're used for in any case. So if anyone could > > > enlighten me I'd appreciate it. Regards,Nandini Hengen > > >

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Re: Mac-OS Dates
by Entwicklung 11 Feb '02

11 Feb '02

> > I think they actually used 1900 there, to make matters even more confusing... > > Just I think so too.. I just landed up with a timespan of 101 years for the date of a file I had created a few months back. This wouldn't make sense if it were 1904. Regards, Nandini Hengen > _______________________________________________ > carbon-development mailing list | carbon-development(a)lists.apple.com > Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/carbon-development > Do not post admin requests to the list. They will be ignored.

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hfs-user February 2002