From nobody Tue Sep 03 13:40:44 2024 X-Original-To: dev-commits-src-all@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4Wymyg2zqbz5PY8T for ; Tue, 03 Sep 2024 13:42:35 +0000 (UTC) (envelope-from garyj@gmx.de) Received: from mout.gmx.net (mout.gmx.net [212.227.15.15]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-256) server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "mout.gmx.net", Issuer "Telekom Security ServerID OV Class 2 CA" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4Wymyf2gdYz4mBb for ; Tue, 3 Sep 2024 13:42:34 +0000 (UTC) (envelope-from garyj@gmx.de) Authentication-Results: mx1.freebsd.org; dkim=pass header.d=gmx.de header.s=s31663417 header.b=snFJ9nEF; dmarc=pass (policy=quarantine) header.from=gmx.de; spf=pass (mx1.freebsd.org: domain of garyj@gmx.de designates 212.227.15.15 as permitted sender) smtp.mailfrom=garyj@gmx.de DKIM-Signature: v=1; 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NEURAL_HAM_MEDIUM(-1.00)[-1.000]; NEURAL_HAM_LONG(-0.77)[-0.769]; DMARC_POLICY_ALLOW(-0.50)[gmx.de,quarantine]; NEURAL_HAM_SHORT(-0.44)[-0.437]; R_DKIM_ALLOW(-0.20)[gmx.de:s=s31663417]; R_SPF_ALLOW(-0.20)[+a:mout.gmx.net]; MIME_GOOD(-0.10)[text/plain]; RWL_MAILSPIKE_GOOD(-0.10)[212.227.15.15:from]; RCVD_IN_DNSWL_LOW(-0.10)[212.227.15.15:from]; ONCE_RECEIVED(0.10)[]; FREEMAIL_ENVFROM(0.00)[gmx.de]; FREEMAIL_FROM(0.00)[gmx.de]; TO_MATCH_ENVRCPT_ALL(0.00)[]; MIME_TRACE(0.00)[0:+]; ARC_NA(0.00)[]; RCPT_COUNT_ONE(0.00)[1]; RCVD_TLS_ALL(0.00)[]; FROM_HAS_DN(0.00)[]; FREEMAIL_REPLYTO(0.00)[gmx.de]; TO_DN_NONE(0.00)[]; REPLYTO_ADDR_EQ_FROM(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; DKIM_TRACE(0.00)[gmx.de:+]; PREVIOUSLY_DELIVERED(0.00)[dev-commits-src-all@freebsd.org]; RCVD_VIA_SMTP_AUTH(0.00)[]; MLMMJ_DEST(0.00)[dev-commits-src-all@freebsd.org]; RCVD_COUNT_ONE(0.00)[1]; ASN(0.00)[asn:8560, ipnet:212.227.0.0/16, country:DE]; HAS_REPLYTO(0.00)[garyj@gmx.de] X-Rspamd-Queue-Id: 4Wymyf2gdYz4mBb On Tue, 3 Sep 2024 10:45:36 GMT Poul-Henning Kamp wrote: > The branch main has been updated by phk: > > URL: https://cgit.FreeBSD.org/src/commit/?id=3Dffaf862df662d507e8dd2667b= ffcba91e3745fe6 > > commit ffaf862df662d507e8dd2667bffcba91e3745fe6 > Author: Poul-Henning Kamp > AuthorDate: 2024-09-03 10:44:20 +0000 > Commit: Poul-Henning Kamp > CommitDate: 2024-09-03 10:44:20 +0000 > > Mention that SILI makes tcopy(1) slow on modern tape drives > --- > usr.bin/tcopy/tcopy.1 | 10 ++++++++++ > 1 file changed, 10 insertions(+) > > diff --git a/usr.bin/tcopy/tcopy.1 b/usr.bin/tcopy/tcopy.1 > index da6a5231a843..f608e0af07e4 100644 > --- a/usr.bin/tcopy/tcopy.1 > +++ b/usr.bin/tcopy/tcopy.1 > @@ -97,6 +97,16 @@ command appeared in > .Sh BUGS > .Bl -item > .It > +Modern tape drives may return a SCSI "Incorrect Length Indicator (ILI)" > +for reach read with a different block size that what is on the I assume this should be "for each read" and "size than what" > +tape, and that slows things down a lot. > +This can be disabled with the > +.Xr mt 1 > +command: > +.Bd -literal -offset indent > +$ mt param sili -s 1 > +.Ed > +.It > Writing an image of a tape to a file does not preserve much more than > the raw data. > Block size(s) and tape EOF marks are lost which would > =2D- Gary Jennejohn