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We had this descussion during the original specification development.&nbsp; For USB, the device controller is removed along with the media.&nbsp; There is nothing present to respond with an RMB bit.&nbsp; If however, you plug in a USB floppy, you can have an RMB bit that
 enables eject function reporting.<br>
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<span style="color:#0B5394">&nbsp;</span><span style="color:#0B5394"></span>
<div><span style="color:#0B5394"><span>---------------------------------------------</span></span></div>
<div><span style="color:#0B5394"><span>Curtis E. Stevens</span></span></div>
<div><span style="color:#0B5394"><span>Technologist</span></span></div>
<div><span style="color:#0B5394"><span>Seagate Technology</span></span></div>
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<div><span style="color:#0B5394"><span>E-Mail: Curtis.Stevens@Seagate.com</span><br>
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<div><span style="color:#0B5394">Phone: 949-307-5050</span></div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> t10-bounces@t10.org &lt;t10-bounces@t10.org&gt; on behalf of Kevin D Butt &lt;kdbutt@us.ibm.com&gt;<br>
<b>Sent:</b> Friday, July 17, 2020 9:40 AM<br>
<b>To:</b> Paul Suhler &lt;Paul.Suhler@kioxia.com&gt;<br>
<b>Cc:</b> t10@t10.org &lt;t10@t10.org&gt;; t10-bounces@t10.org &lt;t10-bounces@t10.org&gt;<br>
<b>Subject:</b> Re: [T10] Revisiting the RMB (Removable Medium) bit definition</font>
<div>&nbsp;</div>
</div>
<div><span style="font-size:10pt; font-family:sans-serif">I concur with Curtis and Paul.</span><br>
<span style="font-size:10pt; font-family:sans-serif"><br>
Kevin D. Butt<br>
SCSI Architect, Tape Firmware, Data Retention Infrastructure<br>
T10 Standards<br>
MS 6TYA, 9000 S. Rita Rd., Tucson, AZ 85744<br>
Tel: 520-799-5280<br>
Fax: 520-799-2723 (T/L:321)<br>
Email address: kdbutt@us.ibm.com<br>
<br>
=========== Interesting Links ===========<br>
[ IBM Tape Storage ] &nbsp;</span><a href="https://urldefense.proofpoint.com/v2/url?u=https-3A__www.ibm.com_it-2Dinfrastructure_storage_tape&amp;d=DwMFAw&amp;c=IGDlg0lD0b-nebmJJ0Kp8A&amp;r=nwHemJnAMSpX8_5V-KnVO4RC6Gz7LepZjtJQCJYPS9M&amp;m=qmU_OTHLUD7JxHe4TLeA_f-Xsszh2_ocvORlu7T4Hs0&amp;s=HnDfWpp9WX_LW5d3u_7ts9PkvrrZjHPwS1fiGXS-WXQ&amp;e="><span style="font-size:10pt; font-family:sans-serif">https://www.ibm.com/it-infrastructure/storage/tape</span></a><span style="font-size:10pt; font-family:sans-serif"><br>
[ SSIC - HBA/OS/Switch/Product interoperation ] </span><a href="https://urldefense.proofpoint.com/v2/url?u=https-3A__www-2D304.ibm.com_systems_support_storage_ssic_interoperability.wss&amp;d=DwMFAw&amp;c=IGDlg0lD0b-nebmJJ0Kp8A&amp;r=nwHemJnAMSpX8_5V-KnVO4RC6Gz7LepZjtJQCJYPS9M&amp;m=qmU_OTHLUD7JxHe4TLeA_f-Xsszh2_ocvORlu7T4Hs0&amp;s=z-vuLx4Brz9iFumSir-8ol8Hx58dPp2DCikkaF6hkrU&amp;e="><span style="font-size:10pt; font-family:sans-serif">https://www-304.ibm.com/systems/support/storage/ssic/interoperability.wss</span></a><span style="font-size:10pt; font-family:sans-serif"><br>
[ LTO &amp; 3592 ISV Support Matrix ] </span><a href="https://urldefense.proofpoint.com/v2/url?u=http-3A__www.ibm.com_systems_resources_lto-5Fisv-5Fmatrix.pdf&amp;d=DwMFAw&amp;c=IGDlg0lD0b-nebmJJ0Kp8A&amp;r=nwHemJnAMSpX8_5V-KnVO4RC6Gz7LepZjtJQCJYPS9M&amp;m=qmU_OTHLUD7JxHe4TLeA_f-Xsszh2_ocvORlu7T4Hs0&amp;s=rrZSTuEQ7GAq_7XEwi8xuTtdmPf59IJBwoYpFPYjbLs&amp;e="><span style="font-size:10pt; font-family:sans-serif">www.ibm.com/systems/resources/lto_isv_matrix.pdf</span></a><span style="font-size:10pt; font-family:sans-serif"><br>
[ LTO SCSI Reference ] </span><a href="https://urldefense.proofpoint.com/v2/url?u=http-3A__www-2D01.ibm.com_support_docview.wss-3Fuid-3Dssg1S7003556&amp;d=DwMFAw&amp;c=IGDlg0lD0b-nebmJJ0Kp8A&amp;r=nwHemJnAMSpX8_5V-KnVO4RC6Gz7LepZjtJQCJYPS9M&amp;m=qmU_OTHLUD7JxHe4TLeA_f-Xsszh2_ocvORlu7T4Hs0&amp;s=qWvhXBnECJy0mEu2mPFbqIb3rlui0n-kbb5_SmYra60&amp;e="><span style="font-size:10pt; font-family:sans-serif">http://www-01.ibm.com/support/docview.wss?uid=ssg1S7003556</span></a><span style="font-size:10pt; font-family:sans-serif"><br>
[ 3592 SCSI Reference ] </span><a href="https://urldefense.proofpoint.com/v2/url?u=http-3A__www-2D01.ibm.com_support_docview.wss-3Fuid-3Dssg1S7003248&amp;d=DwMFAw&amp;c=IGDlg0lD0b-nebmJJ0Kp8A&amp;r=nwHemJnAMSpX8_5V-KnVO4RC6Gz7LepZjtJQCJYPS9M&amp;m=qmU_OTHLUD7JxHe4TLeA_f-Xsszh2_ocvORlu7T4Hs0&amp;s=-8_Imy5S2joab1z2FxWD4ZGaPIHBmDYMAOJJ-q9HDTk&amp;e="><span style="font-size:10pt; font-family:sans-serif">http://www-01.ibm.com/support/docview.wss?uid=ssg1S7003248</span></a><span style="font-size:10pt; font-family:sans-serif"><br>
===================================</span><br>
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<span style="font-size:9pt; color:#5f5f5f; font-family:sans-serif">From: &nbsp; &nbsp; &nbsp; &nbsp;</span><span style="font-size:9pt; font-family:sans-serif">Paul Suhler &lt;Paul.Suhler@kioxia.com&gt;</span><br>
<span style="font-size:9pt; color:#5f5f5f; font-family:sans-serif">To: &nbsp; &nbsp; &nbsp; &nbsp;</span><span style="font-size:9pt; font-family:sans-serif">&quot;Ballard, Curtis C (HPE Storage)&quot; &lt;curtis.ballard@hpe.com&gt;, Ralph Weber &lt;Ralph.Weber@wdc.com&gt;, &quot;t10@t10.org&quot; &lt;t10@t10.org&gt;</span><br>
<span style="font-size:9pt; color:#5f5f5f; font-family:sans-serif">Date: &nbsp; &nbsp; &nbsp; &nbsp;</span><span style="font-size:9pt; font-family:sans-serif">07/17/2020 09:19</span><br>
<span style="font-size:9pt; color:#5f5f5f; font-family:sans-serif">Subject: &nbsp; &nbsp; &nbsp; &nbsp;</span><span style="font-size:9pt; font-family:sans-serif">[EXTERNAL] Re: [T10] Revisiting the RMB (Removable Medium) bit definition</span><br>
<span style="font-size:9pt; color:#5f5f5f; font-family:sans-serif">Sent by: &nbsp; &nbsp; &nbsp; &nbsp;</span><span style="font-size:9pt; font-family:sans-serif">t10-bounces@t10.org</span><br>
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<p style="margin-top:0px; margin-bottom:0px"><span style="font-size:11pt; color:#004080; font-family:Calibri">I agree with Curtis about the need to be able to report NOT READY, MEDIUM NOT PRESENT. I’ve worked on both SSC and SBC devices like that.</span></p>
<p style="margin-top:0px; margin-bottom:0px"><span style="font-size:11pt; color:#004080; font-family:Calibri">&nbsp;</span></p>
<p style="margin-top:0px; margin-bottom:0px"><span style="font-size:11pt; color:#004080; font-family:Calibri">Paul</span></p>
<p style="margin-top:0px; margin-bottom:0px"><span style="font-size:11pt; color:#004080; font-family:Calibri">Kioxia</span></p>
<p style="margin-top:0px; margin-bottom:0px"><span style="font-size:11pt; color:#004080; font-family:Calibri">&nbsp;</span></p>
<p style="margin-top:0px; margin-bottom:0px"><span style="font-size:11pt; font-family:Calibri"><b>From:</b>t10-bounces@t10.org &lt;t10-bounces@t10.org&gt;
<b>On Behalf Of </b>Ballard, Curtis C (HPE Storage)<b><br>
Sent:</b> Friday, July 17, 2020 9:54 AM<b><br>
To:</b> Ralph Weber &lt;Ralph.Weber@wdc.com&gt;; t10@t10.org<b><br>
Subject:</b> Re: [T10] Revisiting the RMB (Removable Medium) bit definition</span></p>
<p style="margin-top:0px; margin-bottom:0px"><span style="font-size:11pt; font-family:Calibri">&nbsp;</span></p>
<p style="margin-top:0px; margin-bottom:0px"><span style="font-size:11pt; font-family:Calibri">Ralph,</span></p>
<p style="margin-top:0px; margin-bottom:0px"><span style="font-size:11pt; font-family:Calibri">&nbsp;</span></p>
<p style="margin-top:0px; margin-bottom:0px"><span style="font-size:11pt; font-family:Calibri">That bit is used with tape drives and was used with SCSI magneto optical drives, DVD drives, etc. &nbsp;</span></p>
<p style="margin-top:0px; margin-bottom:0px"><span style="font-size:11pt; font-family:Calibri">&nbsp;</span></p>
<p style="margin-top:0px; margin-bottom:0px"><span style="font-size:11pt; font-family:Calibri">Even system I’ve used with that bit set to one, and I’ve worked with several devices from different manufacturers that set that bit to one, only use it in reference
 to the media with no device server disruption other than the expected Unit Attention condition transitions as the media is removed and re-loaded.</span></p>
<p style="margin-top:0px; margin-bottom:0px"><span style="font-size:11pt; font-family:Calibri">&nbsp;</span></p>
<p style="margin-top:0px; margin-bottom:0px"><span style="font-size:11pt; font-family:Calibri">SCSI devices should only set that bit to one if they are able to report an 02h/3Ah/00h – NOT READY, MEDIUM NOT PRESENT</span></p>
<p style="margin-top:0px; margin-bottom:0px"><span style="font-size:11pt; font-family:Calibri">&nbsp;</span></p>
<p style="margin-top:0px; margin-bottom:0px"><span style="font-size:11pt; font-family:Calibri">Curtis Ballard</span></p>
<p style="margin-top:0px; margin-bottom:0px"><span style="font-size:11pt; font-family:Calibri">Hewlett Packard Enterprise</span></p>
<p style="margin-top:0px; margin-bottom:0px"><span style="font-size:11pt; font-family:Calibri">&nbsp;</span></p>
<p style="margin-top:0px; margin-bottom:0px"><span style="font-size:11pt; font-family:Calibri"><b>From:</b></span><a href="mailto:t10-bounces@t10.org"><span style="font-size:11pt; color:#0082bf; font-family:Calibri"><u>t10-bounces@t10.org</u></span></a><span style="font-size:11pt; font-family:Calibri">&lt;</span><a href="mailto:t10-bounces@t10.org"><span style="font-size:11pt; color:#0082bf; font-family:Calibri"><u>t10-bounces@t10.org</u></span></a><span style="font-size:11pt; font-family:Calibri">&gt;
<b>On Behalf Of </b>Ralph Weber<b><br>
Sent:</b> Thursday, July 16, 2020 5:27 PM<b><br>
To:</b> </span><a href="mailto:t10@t10.org"><span style="font-size:11pt; color:#0082bf; font-family:Calibri"><u>t10@t10.org</u></span></a><span style="font-size:11pt; font-family:Calibri"><b><br>
Subject:</b> [T10] Revisiting the RMB (Removable Medium) bit definition</span></p>
<p style="margin-top:0px; margin-bottom:0px"><span style="font-size:11pt; font-family:Calibri">&nbsp;</span></p>
<p style="margin-top:0px; margin-bottom:0px"><span style="font-size:11pt; font-family:Calibri">Regarding the Standard INQUIRY data RMB bit, SPC-6 r02 says…</span></p>
<p style="margin-top:0px; margin-bottom:0px"><span style="font-size:11pt; font-family:Calibri">“A removable medium (</span><span style="font-size:9pt; font-family:Calibri">RMB</span><span style="font-size:11pt; font-family:Calibri">) bit set to zero indicates
 that the medium is not removable. A </span><span style="font-size:9pt; font-family:Calibri">RMB
</span><span style="font-size:11pt; font-family:Calibri">bit set to one indicates that the medium is removable.”</span></p>
<p style="margin-top:0px; margin-bottom:0px"><span style="font-size:11pt; font-family:Calibri">&nbsp;</span></p>
<p style="margin-top:0px; margin-bottom:0px"><span style="font-size:11pt; font-family:Calibri">An interesting debate has developed regarding whether a USB “memory stick” is an
</span><span style="font-size:9pt; font-family:Calibri">RMB</span><span style="font-size:11pt; font-family:Calibri">=0 or an
</span><span style="font-size:9pt; font-family:Calibri">RMB</span><span style="font-size:11pt; font-family:Calibri">=1 device.</span></p>
<p style="margin-top:0px; margin-bottom:0px"><span style="font-size:11pt; font-family:Calibri">&nbsp;</span></p>
<p style="margin-top:0px; margin-bottom:0px"><span style="font-size:11pt; font-family:Calibri">One wag has suggested that the RMB bit definition be conditionalized on the presence/absence of a coincident Logical Unit Reset condition or I_T Nexus Loss condition,
 something along the lines of…</span></p>
<p style="margin-top:0px; margin-bottom:0px"><span style="font-size:11pt; font-family:Calibri">“A removable medium (</span><span style="font-size:9pt; font-family:Calibri">RMB</span><span style="font-size:11pt; font-family:Calibri">) bit set to zero indicates
 that the medium is not removable </span><span style="font-size:11pt; color:#0082bf; font-family:Calibri"><u>without resulting in a Logical Unit Reset condition (see SAM-6) or an I_T Nexus Loss condition (see SAM-6)</u></span><span style="font-size:11pt; font-family:Calibri">.
 A </span><span style="font-size:9pt; font-family:Calibri">RMB </span><span style="font-size:11pt; font-family:Calibri">bit set to one indicates that the medium is removable
</span><span style="font-size:11pt; color:#0082bf; font-family:Calibri"><u>with no concurrent Logical Unit Reset condition or I_T Nexus Loss condition</u></span><span style="font-size:11pt; font-family:Calibri">.”</span></p>
<p style="margin-top:0px; margin-bottom:0px"><span style="font-size:11pt; font-family:Calibri">&nbsp;</span></p>
<p style="margin-top:0px; margin-bottom:0px"><span style="font-size:11pt; font-family:Calibri">How says the T10 body politic?</span></p>
<p style="margin-top:0px; margin-bottom:0px"><span style="font-size:11pt; font-family:Calibri">&nbsp;</span></p>
<p style="margin-top:0px; margin-bottom:0px"><span style="font-size:11pt; font-family:Calibri">Thanks,</span></p>
<p style="margin-top:0px; margin-bottom:0px"><span style="font-size:11pt; font-family:Calibri">&nbsp;</span></p>
<p style="margin-top:0px; margin-bottom:0px"><span style="font-size:11pt; font-family:Calibri">.Ralph</span><tt><span style="font-size:10pt">_______________________________________________<br>
T10 mailing list<br>
T10@t10.org<br>
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