Date: Mon, 27 Oct 2003 13:53:18 +0100 From: Stefan Walter <sw@gegenunendlich.de> To: freebsd-current@freebsd.org Subject: GBDE performance on ZIP disks Message-ID: <20031027125318.GB1582@kyuzo.dunkelkammer.void>
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--7JfCtLOvnd9MIVvH Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Hi, is there a way to speed up writing to a gbde encrypted ZIP disk? Copying 37 MB of data to an encrypted disk (in a SCSI drive) that has been initialized with "newfs -O 2 -U /dev/da1a.bde" takes ~180 seconds, which is ~200KB/s. Copying the same amount of data to the disk without using gbde takes ~50 seconds, which is ~740KB/s. I guess this problem is similar to the one you have when using msdosfs on a SCSI ZIP drive, which is also very slow. Using a different sector size than the default 512, which is also the sector size of the media, doesn't seem to be possible and always results in a "gbde: write sector 0: Operation not permitted". Playing around with newfs's options didn't help so far, either. Stefan --7JfCtLOvnd9MIVvH Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.3 (FreeBSD) iQGVAwUBP50VPlaRERsSueCzAQIdpQwAurtBaNiju+49GsHqJ29QLx9BHMeT5CCv V9JzqwqbCOpXx6w9Ddxn5KiX/OGjO+PtWOeOiSbXGZRjmOazMA/EoSXb8JpuifGj emu+0xKDpqNaLqf2fFZp1mqh9iMv4/P05x5RXrbMtfnEpWP8O33wr//J3G1i40kS hpgJXN+9RrkbrEHn0x9zDjDJTC2OChobnWYct9oXm03QK5h43KevYZa1kjtfP3SN i+aa01mp7DRNPNs+qwlbFUvDESzBMVsxkdDd2fUfX9Cna7YNOo961Mzie+iPQblx 2bN8OMI1+CmtnGKcY63789LM6Ejb7LpupjK72/5ziOJ5dd6+cLx50O7WNpbpYmu1 nBHCA3RPTTPVHQKNKWgiVzjNaiJpBYstnBoY/nZNlAkaW2XXCK05ZdbXpHvvFuxx SLHUmEyozO6CVcwxPwThvX3WGtj23O9godxq1ZoPaSyRFxROFi18iBI54kt9YKIE 7FUP94AlK7bdThQAD+SQOchvwCAUtei+ =aXid -----END PGP SIGNATURE----- --7JfCtLOvnd9MIVvH--
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