{"id":465,"date":"2011-04-14T19:12:00","date_gmt":"2011-04-15T02:12:00","guid":{"rendered":"https:\/\/kb.terabyteunlimited.com\/kb-articles\/system-hangs-when-sata-ahci-support-is-enabled-2\/"},"modified":"2021-09-07T14:59:09","modified_gmt":"2021-09-07T21:59:09","slug":"system-hangs-when-sata-ahci-support-is-enabled-2","status":"publish","type":"lsvr_kba","link":"https:\/\/www.terabyteunlimited.com\/kb\/kb-articles\/system-hangs-when-sata-ahci-support-is-enabled-2\/","title":{"rendered":"System Hangs when SATA-AHCI Support is Enabled"},"content":{"rendered":"<p><strong><font color=\"#ff5500\">Problem:<\/font><\/strong><\/p>\r\n  <ul>\r\n    <li>The system hangs and &quot;reboot may be required&quot; is shown in the lower left corner of the BootIt BM desktop. <br \/><br \/><\/li>\r\n    <li>When in&nbsp;<strong>Partition Work<\/strong>,&nbsp;the system hangs when&nbsp;the <strong>BIOS (direct)<\/strong> bus method is used. <br \/><br \/><\/li>\r\n    <li>The system hangs for a while then shows no partitions on the drive. <\/li>\r\n  <\/ul>\r\n  <p><strong><font color=\"#ff5500\">Condition:<\/font><\/strong><\/p>\r\n  <ul>\r\n    <li>The <strong>SATA-AHCI<\/strong> option in BootIt BM is enabled. <\/li>\r\n    <li>The system uses SATA hard drives. <\/li>\r\n  <\/ul>\r\n  <p><strong><font color=\"#ff5500\">Cause:<\/font><\/strong><\/p>\r\n  <ul>\r\n    <li>This occurs when the BIOS attempts to access the SATA hard drive and either times-out or is unable to return. <\/li>\r\n  <\/ul>\r\n  <p><strong><font color=\"#ff5500\">Solution:<\/font><\/strong><\/p>\r\n  <ul>\r\n    <li>Disable the&nbsp;<strong>SATA-AHCI<\/strong> option&nbsp;in <strong>Settings<\/strong>; or <br \/><br \/><\/li>\r\n    <li>Reboot the system using <strong>Ctrl+Alt+Delete<\/strong> when you see the &quot;reboot may be required&quot; message. <\/li>\r\n  <\/ul>\r\n  <p><strong><font color=\"#ff5500\">Details:<\/font><\/strong><\/p>\r\n  <p>BootIt&nbsp;BM includes support for&nbsp;bypassing the BIOS when&nbsp;accessing SATA drives. Due to&nbsp;system specifications actually in use, this requires BootIt BM&nbsp;to initialize and communicate directly&nbsp;with the&nbsp;SATA controller.<\/p>\r\n  <p>Unfortunately,&nbsp;the hand-off mechanism as implemented by many systems is one direction only. This means that&nbsp;once one of those&nbsp;BIOSes gives up control of the SATA controller, it won't attempt to take it back. As a result, when a BIOS request is issued for a SATA drive, the BIOS hangs up.<\/p>\r\n  <p>When&nbsp;<strong>Partition Work<\/strong> is opened and the <strong>BIOS (direct) <\/strong>method is selected, BootIt BM&nbsp;attempts to match BIOS drives to SATA drives. If it can't--such as when a BIOS doesn't provide the correct information needed--then the BIOS is used to access the hard drive. When&nbsp;<strong>Partition Work<\/strong> is closed, BootIt BM&nbsp;releases&nbsp;direct control of the SATA controller and all future SATA hard drive requests&nbsp;are handled by the BIOS. These future hard drive requests can occur if you choose an option that requires BootIt BM to read from a drive or load information from the BootIt BM partition itself.<\/p>","protected":false},"excerpt":{"rendered":"<p>Problem: The system hangs and &quot;reboot may be required&quot; is shown in the lower left corner of the BootIt BM desktop. When in&nbsp;Partition Work,&nbsp;the system hangs when&nbsp;the BIOS (direct) bus method is used. The system hangs for a while then shows no partitions on the drive. Condition: The SATA-AHCI option in BootIt BM is enabled. [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"lsvr_kba_cat":[1826],"lsvr_kba_tag":[2119],"class_list":["post-465","lsvr_kba","type-lsvr_kba","status-publish","hentry","lsvr_kba_cat-bootit-bare-metal-problem-solving-bootit","lsvr_kba_tag-bootit-bare-metal"],"_links":{"self":[{"href":"https:\/\/www.terabyteunlimited.com\/kb\/wp-json\/wp\/v2\/lsvr_kba\/465","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.terabyteunlimited.com\/kb\/wp-json\/wp\/v2\/lsvr_kba"}],"about":[{"href":"https:\/\/www.terabyteunlimited.com\/kb\/wp-json\/wp\/v2\/types\/lsvr_kba"}],"author":[{"embeddable":true,"href":"https:\/\/www.terabyteunlimited.com\/kb\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/www.terabyteunlimited.com\/kb\/wp-json\/wp\/v2\/comments?post=465"}],"version-history":[{"count":1,"href":"https:\/\/www.terabyteunlimited.com\/kb\/wp-json\/wp\/v2\/lsvr_kba\/465\/revisions"}],"predecessor-version":[{"id":6253,"href":"https:\/\/www.terabyteunlimited.com\/kb\/wp-json\/wp\/v2\/lsvr_kba\/465\/revisions\/6253"}],"wp:attachment":[{"href":"https:\/\/www.terabyteunlimited.com\/kb\/wp-json\/wp\/v2\/media?parent=465"}],"wp:term":[{"taxonomy":"lsvr_kba_cat","embeddable":true,"href":"https:\/\/www.terabyteunlimited.com\/kb\/wp-json\/wp\/v2\/lsvr_kba_cat?post=465"},{"taxonomy":"lsvr_kba_tag","embeddable":true,"href":"https:\/\/www.terabyteunlimited.com\/kb\/wp-json\/wp\/v2\/lsvr_kba_tag?post=465"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}