THE Wiki

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====== SLES ======

==== Add Salt Minion to SUSE Manager ====
   # cleanup if necessary
   rpm -qa | grep salt
   rpm -e salt-2016.11.10-43.54.1.x86_64 salt-minion-2016.11.10-43.54.1.x86_64
   rm -r /etc/salt
   rm /etc/zypp/services.d/*
   rm /etc/zypp/repos.d/*

   # connect minion. 
   zypper ar http://my.sum.url.de/pub/repositories/sle/12/5/bootstrap sles12-sp5
   zypper in salt-minion
   sed -i 's/\#master: salt/master: my.sum.url.de/' /etc/salt/minion
   rm /etc/machine-id
   systemd-machine-id-setup
   rm /var/lib/dbus/machine-id
   dbus-uuidgen --ensure
   systemctl enable salt-minion.service
   hostname > /etc/salt/minion_id
   echo "deployment: asvpn" >> /etc/salt/grains
   rcsalt-minion start
   *WAIT*
   zypper lr

==== iSCSI =====

  195  2013-06-30 11:32:28 iscsiadm -m node iqn.2013-06.home.itbetrieb:tsm --login
  198  2013-06-30 11:49:53 iscsiadm -m node --logout

==== kernelupdate kills modules =====

  root@bacula:/etc/iscsi#  iscsiadm -m discovery -t sendtargets -p 192.168.178.21:3260
  iscsiadm: read error (-1/104), daemon died?
  iscsiadm: Could not scan /sys/class/iscsi_transport.
  libkmod: ERROR ../libkmod/libkmod-module.c:838 kmod_module_insert_module: could not find module by        name='iscsi_tcp'
  iscsiadm: Could not insert module tcp. Kmod error -2
  iscsiadm: iSCSI driver tcp is not loaded. Load the module then retry the command.
  iscsiadm: Could not perform SendTargets discovery: iSCSI driver not found. Please make sure it is loaded, and   retry the operation
  
  missing module is included in:
  
  apt-get install linux-modules-extra

  
  iscsiadm -m node iqn.2014-01.home.itbetrieb:tsm.disk1 --portal "192.168.56.50:3260"
==== iSCSI target =====

bind specific interface.
- not possible through /etc/ietf.conf.
- change /etc/init.d/iscsitarget line :
        startproc -p $PIDFILE $DAEMON 
add parameter address
        startproc -p $PIDFILE $DAEMON --address 192.168.56.100


connect to iscsi target:
tsm2:/etc/init.d # iscsiadm -m node -n  iqn.2013-06.home.itbetrieb:tsm --login


List all iscsi Volumes that are available on the Target

  infra:/dev # cat /proc/net/iet/volume
  tid:1 name:iqn.2014-02.home.itbetrieb:72f59e27-9c61-44ce-9936-74c788cdb221
        lun:0 state:0 iotype:fileio iomode:wt blocks:20963328 blocksize:512 path:/dev/vg01/lvol1
        lun:1 state:0 iotype:fileio iomode:wt blocks:9830400 blocksize:512 path:/dev/vg02/lvol1
        lun:2 state:0 iotype:fileio iomode:wt blocks:9830400 blocksize:512 path:/dev/vg02/lvol2
        lun:3 state:0 iotype:fileio iomode:wt blocks:9830400 blocksize:512 path:/dev/vg02/lvol3
        lun:4 state:0 iotype:fileio iomode:wt blocks:33415168 blocksize:512 path:/dev/vg02/lvol4


List all Volumes/disks that are avaiable at the initiator after iscsi --login
		
  tsmsrv1:/dev # lsscsi
  [0:0:0:0]    disk    ATA      VBOX HARDDISK    1.0   /dev/sda
  [2:0:0:0]    cd/dvd  VBOX     CD-ROM           1.0   /dev/sr0
  [7:0:0:0]    disk    IET      VIRTUAL-DISK     0     /dev/sdb
  [7:0:0:1]    disk    IET      VIRTUAL-DISK     0     /dev/sdc
  [7:0:0:2]    disk    IET      VIRTUAL-DISK     0     /dev/sdd
  [7:0:0:3]    disk    IET      VIRTUAL-DISK     0     /dev/sde
  [7:0:0:4]    disk    IET      VIRTUAL-DISK     0     /dev/sdf



==== SLEHA - corosync pacemaker ====


pvcreate /dev/sdb
pvcreate /dev/sdc
pvcreate /dev/sdd
pvcreate /dev/sde
pvcreate /dev/sdf
 
lrwxrwxrwx 1 root root  9 Feb  5 12:48 ip-192.168.56.100:3260-iscsi-iqn.2014-02.home.itbetrieb:72f59e27-9c61-44ce-9936-74c788cdb221-lun-0 -> ../../sdb
lrwxrwxrwx 1 root root  9 Feb  5 12:48 ip-192.168.56.100:3260-iscsi-iqn.2014-02.home.itbetrieb:72f59e27-9c61-44ce-9936-74c788cdb221-lun-1 -> ../../sdc
lrwxrwxrwx 1 root root  9 Feb  5 12:48 ip-192.168.56.100:3260-iscsi-iqn.2014-02.home.itbetrieb:72f59e27-9c61-44ce-9936-74c788cdb221-lun-2 -> ../../sdd
lrwxrwxrwx 1 root root  9 Feb  5 12:48 ip-192.168.56.100:3260-iscsi-iqn.2014-02.home.itbetrieb:72f59e27-9c61-44ce-9936-74c788cdb221-lun-3 -> ../../sde
lrwxrwxrwx 1 root root  9 Feb  5 12:48 ip-192.168.56.100:3260-iscsi-iqn.2014-02.home.itbetrieb:72f59e27-9c61-44ce-9936-74c788cdb221-lun-4 -> ../../sdf

sdb disk:
iscsiadm -m node -T iqn.2014-02.home.itbetrieb:71bda8c2-ac75-48a9-a30b-7f958d3bcf8f --login

		
		
login to ONLY ONE target:
iscsiadm -m node -T iqn.2014-02.home.itbetrieb:72f59e27-9c61-44ce-9936-74c788cdb221 --login 


infra:/etc # cat /proc/net/iet/session
tid:1 name:iqn.2014-02.home.itbetrieb:72f59e27-9c61-44ce-9936-74c788cdb221
        sid:562950141968896 initiator:iqn.2014-02.home.itbetrieb:01:57575330903e
                cid:0 ip:192.168.56.101 state:active hd:none dd:none

				
unavailable vgs after setting sbd to wrong device

infra:/dev # vgchange -a y vg01
  1 logical volume(s) in volume group "vg01" now active
infra:/dev # vgchange -a y vg02
  4 logical volume(s) in volume group "vg02" now active
infra:/dev # vgchange -a y vg04
  Volume group "vg04" not found
infra:/dev # vgchange -a y vg03
  1 logical volume(s) in volume group "vg03" now active


LATEST ERROR
  
 Retrieving SSH keys from 192.168.56.101
  Configuring csync2
  Enabling csync2 service
  Enabling xinetd service
  Merging known_hosts
  Probing for new partitions......ERROR: Failed to probe new partitions
tsmsrv2:/dev/disk/by-path # crm status
Could not establish cib_ro connection: Connection refused (111)
ERROR: crm_mon exited with code 107 and said: Connection to cluster failed: Transport endpoint is not connected


infra:/var/log # cat /proc/net/iet/volume
tid:2 name:iqn.2014-02.home.itbetrieb:72f59e27-9c61-44ce-9936-74c788cdb221
        lun:0 state:0 iotype:fileio iomode:wt blocks:20963328 blocksize:512 path:/dev/vg01/lvol1
        lun:1 state:0 iotype:fileio iomode:wt blocks:9830400 blocksize:512 path:/dev/vg02/lvol1
        lun:2 state:0 iotype:fileio iomode:wt blocks:9830400 blocksize:512 path:/dev/vg02/lvol2
        lun:3 state:0 iotype:fileio iomode:wt blocks:9830400 blocksize:512 path:/dev/vg02/lvol3
        lun:4 state:0 iotype:fileio iomode:wt blocks:33415168 blocksize:512 path:/dev/vg02/lvol4
tid:1 name:iqn.2014-02.home.itbetrieb:71bda8c2-ac75-48a9-a30b-7f958d3bcf8f
        lun:0 state:0 iotype:fileio iomode:wt blocks:2088960 blocksize:512 path:/dev/vg03/lvol1
		
wenn keine luns da: iscsitarget restart


delete modify a resource
   crm_resource -D --resource vtsm1-target -t primitive
   # crm resource param <resource> set <name> <value>
   # crm resource param <resource> delete <name>
   # crm resource param <resource> show <name>

failed Meldungen loswerden.
  # crm resource cleanup <resource>


# clustermode für vg aktivieren:
    vgchange -c y

node tsmsrv1
node tsmsrv2

  crm configure primitive vtsm1IP ocf:heartbeat:IPaddr params ip="192.168.56.111" op monitor interval="10s"

  # mirroring (not wanted in this case)
  # crm configure primitive iscsi-drbd ocf:linbit:drbd params drbd_resource="iscsi" op monitor interval="30s" op start interval="0" timeout="240s" op stop interval="0" timeout="100s"


  # crm configure primitive vtsm1target ocf:heartbeat:iSCSITarget params iqn="iqn.2014-02.home.itbetrieb:72f59e27-9c61-44ce-9936-74c788cdb221" tid="2" op monitor interval="30s"
  # crm configure primitive vtsm1lun0 ocf:heartbeat:iSCSILogicalUnit params target_iqn="iqn.2014-02.home.itbetrieb:72f59e27-9c61-44ce-9936-74c788cdb221" lun="0" path="/dev/disk/by-path/ip-192.168.56.100:3260-iscsi-iqn.2014-02.home.itbetrieb:72f59e27-9c61-44ce-9936-74c788cdb221-lun-0"

  # crm configure primitive vtsm1lun1 ocf:heartbeat:iSCSILogicalUnit params target_iqn="iqn.2014-02.home.itbetrieb:72f59e27-9c61-44ce-9936-74c788cdb221" lun="1" path="/dev/drbd1"
  # crm configure primitive vtsm1lun2 ocf:heartbeat:iSCSILogicalUnit params target_iqn="iqn.2014-02.home.itbetrieb:72f59e27-9c61-44ce-9936-74c788cdb221" lun="2" path="/dev/drbd1"
  # crm configure primitive vtsm1lun3 ocf:heartbeat:iSCSILogicalUnit params target_iqn="iqn.2014-02.home.itbetrieb:72f59e27-9c61-44ce-9936-74c788cdb221" lun="3" path="/dev/drbd1"
  # crm configure primitive vtsm1lun4 ocf:heartbeat:iSCSILogicalUnit params target_iqn="iqn.2014-02.home.itbetrieb:72f59e27-9c61-44ce-9936-74c788cdb221" lun="1" path="/dev/drbd1"



  crm configure primitive vtsm1IP ocf:heartbeat:IPaddr params ip="192.168.56.111" op monitor interval="10s" 
  crm configure primitive vtsm1LVM ocf:heartbeat:LVM params volgrpname="vg01" exclusive="yes" op monitor interval="60s" timeout="60s"
  crm configure primitive vtsm1db ocf:heartbeat:Filesystem params device="/dev/vg01/lvol1" directory="/vtsm1/db" fstype="xfs" op monitor interval="20" timeout="40"
  crm configure primitive vtsm1log ocf:heartbeat:Filesystem params device="/dev/vg01/lvol2" directory="/vtsm1/log" fstype="xfs" op monitor interval="20" timeout="40"
  crm configure primitive vtsm1archlog ocf:heartbeat:Filesystem params device="/dev/vg01/lvol3" directory="/vtsm1/archlog:" fstype="xfs" op monitor interval="20" timeout="40"
  crm configure primitive vtsm1disk ocf:heartbeat:Filesystem params device="/dev/vg01/lvol4" directory="/vtsm1/disk" fstype="xfs" op monitor interval="20" timeout="40"
  crm configure primitive vtsm1server ocf:heartbeat:Filesystem params device="/dev/vg01/lvol5" directory="/vtsm1/server" fstype="xfs" op monitor interval="20" timeout="40"
  crm configure group vtsm1 vtsm1IP vtsm1LVM vtsm1db vtsm1log vtsm1archlog vtsm1disk vtsm1server meta target-role="Started" is-managed="true"
  crm configure location cli-standby-vtsm1 vtsm1 rule $id="cli-standby-rule-vtsm1" -inf: #uname eq tsmsrv1

  crm configure primitive vtsm1run lsb:tsmserver_vtsm1  



  crm_resource -D --resource vtsm1 -t group
  crm_resource -D --resource vtsm1LVM -t primitive
  crm_resource -D --resource vtsm1db -t primitive
  crm_resource -D --resource vtsm1log -t primitive
  crm_resource -D --resource vtsm1archlog -t primitive
  crm_resource -D --resource vtsm1disk -t primitive  
  crm_resource -D --resource vtsm1server -t primitive
  crm_resource -D --resource vtsm1IP -t primitive
 
   primitive tsmtlmLVM ocf:heartbeat:LVM \
        params volgrpname="vg02" exclusive="yes" \
        op monitor interval="60s" timeout="60s"
		
   primitive vtsm1db ocf:heartbeat:Filesystem \
        params device="/dev/vg01/lvol1" directory="/vtsm1/db" fstype="xfs" \
        op monitor interval="20" timeout="40"
   primitive tsmtlmrun lsb:tsmserver_tsmtlm
   primitive vtsm1db ocf:heartbeat:Filesystem \
        params device="/dev/vg01/lvol2" directory="/vtsm1/log" fstype="xfs" \
        op monitor interval="20" timeout="40"
   primitive vtsm1db ocf:heartbeat:Filesystem \
        params device="/dev/vg01/lvol3" directory="/vtsm1/archlog" fstype="xfs" \
        op monitor interval="20" timeout="40"
   primitive vtsm1db ocf:heartbeat:Filesystem \
        params device="/dev/vg01/lvol4" directory="/vtsm1/disk" fstype="xfs" \
        op monitor interval="20" timeout="40"
   primitive vtsm1db ocf:heartbeat:Filesystem \
        params device="/dev/vg01/lvol5" directory="/vtsm1/server" fstype="xfs" \
        op monitor interval="20" timeout="40"
		
   primitive tsmtrun lsb:tsmserver_tsmt
   group tsmt tsmtIP tsmtLVM tsmtMount1 tsmtMount2 tsmtMount3 tsmtMount4 tsmtMount5 tsmtrun \
        meta target-role="Started" is-managed="true"
   group tsmtlm tsmtlmIP tsmtlmLVM tsmtlmMount1 tsmtlmMount2 tsmtlmMount3 tsmtlmMount4 tsmtlmrun \
        meta target-role="Started"
   location cli-standby-tsmt tsmt \
        rule $id="cli-standby-rule-tsmt" -inf: #uname eq tsmlintst1
   location cli-standby-tsmtlm tsmtlm \
        rule $id="cli-standby-rule-tsmtlm" -inf: #uname eq tsmlintst2
   property $id="cib-bootstrap-options" \
        dc-version="1.1.6-b988976485d15cb702c9307df55512d323831a5e" \
        cluster-infrastructure="openais" \
        expected-quorum-votes="2" \
        stonith-enabled="false" \
        no-quorum-policy="ignore" \


  crm configure primitive vtsm1ip ocf:IPaddr2 params ip=192.168.56.111 cidr_netmask=32 nic=eth2 op monitor interval=30s

move vg between clusternodes:
   http://www.tldp.org/HOWTO/LVM-HOWTO/recipemovevgtonewsys.html

   vgchange 
   vgexport
   vgimport
   vgchange


create sbd device for pacemaker
  tsmsrv1:~ # sbd -d /dev/sdb create
  Initializing device /dev/sdb
  Creating version 2.1 header on device 3 (uuid: 5f960a58-8429-4397-ad4b-b2b879aa600c)
  Initializing 255 slots on device 3
  Device /dev/sdb is initialized.
  tsmsrv1:~ #
  tsmsrv1:~ #
  tsmsrv1:~ # /etc/init.d/
  tsmsrv1:~ # /etc/init.d/openais start
  Starting OpenAIS/Corosync daemon (corosync): Starting SBD - starting... OK

  tsmsrv1:/etc/lvm # lsblk
  NAME   MAJ:MIN RM   SIZE RO MOUNTPOINT
  sda      8:0    0    20G  0
  ââsda1   8:1    0     2G  0 [SWAP]
  ââsda2   8:2    0    18G  0 /
  sr0     11:0    1  1024M  0
  sdb      8:16   0  1020M  0
  sdc      8:32   0    10G  0


crm configure primitive clvm ocf:lvm2:clvmd params daemon_timeout="30"
crm configure primitive vg1 ocf:heartbeat:LVM params volgrpname="cluster-vg" exclusive="yes" op monitor interval="60" timeout="60"

==== Lin_tape / udev ====

barcode lenght @lin_tape

options lin_tape ibm3592_barcode=8
options lin_tape lto_barcode=6

Stop and start the driver by running these commands.
   lin_taped stop
   rmmod lin_tape
   depmod
   modprobe lin_tape (reinstall back)
   lin_taped (restart the daemon)

If there is a tape device attached to the Linux system with world-wide port name
“0x123456789ABCDEF0” with a current device name of /dev/IBMtape0, a user
could run udevadm info to obtain information on exported attributes for this
device. This could be done as follows:
>udevadm info --attribute-walk --name /dev/IBMtape0
The output of this command should include something similar to the following:
ATTRS{serial_num}=="123456789"
ATTRS{ww_node_name}=="0x123456789ABCDEF1"
ATTRS{ww_port_name}=="0x123456789ABCDEF0"
Note: Variations exist between kernels. For example, if you are using udevinfo,
you should enter the previous command as
>udevinfo -a -p `udevinfo -q path -n /dev/IBMtape0`
Also, on some kernels an attribute ATTRS{xxx} will be replaced by
SYSFS{xxx}. Furthermore, some kernels use a '=' (single equal sign) to
indicate an attribute match as well as an assignment, whereas other kernels
use a '==' (double equal sign) for a match and '=' for assignment. You
should place the attribute from the attribute list into your rules file exactly
as it appears in the attribute list, as described below.
We can use the ww_port_name in a .rules file that will assign a symbolic link to a
device that has the listed world-wide port name. The file will typically be placed
in /etc/udev/rules.d, but this location may be changed by the udev_rules
Linux Device Driver (lin_tape)
Chapter 5. Linux Tape and Medium Changer Device Driver 105
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directive in the /etc/udev/rules.conf file. In this example, we create a file called
/etc/udev/rules.d/98-lin_tape.rules and write a single line to the file:
KERNEL=="IBMtape*", ATTRS{ww_port_name}=="0x123456789ABCDEF0", SYMLINK="lin_tape/by-id/lin_tape480110
Assuming that the udev service is running and configured correctly, the user can
install or reinstall lin_tape using modprobe, and the symbolic link should be
created in the /dev/lin_tape/by-id folder. One line should be added to the
98-lin_tape.rules file for each symbolic link desired.

==== DD ====

Ceating a large file for backup and restore purpouses

  dd if=/dev/zero of=100GB.FILE bs=10k count=10000000 <- Optimale Komprimierung möglich 8-)
  dd if=/dev/urandom of=100GB.RANDOM.FILE bs=10k count=10000000
  
  dd if=/dev/zero of=/dev/sdd bs=1G count=1 oflag=direct


==== LVM2 ====

Preparation of 1 or more hard disks for LVM

  pvcreate /dev/sda /dev/mapper/myname 

Creating a VolumeGroup 
 
  vgcreate -s 4M vgname /dev/sda /dev/mapper/myname

Configuring a Logical Volume in the Group 

  lvcreate -l100% -n lvol01 vgname

==== Mount ====

  mount -t xfs device mountpoint

==== Multipathing ====


dry run, verbosity level 2:

  multipath -v2 -d

list configured devices

  multipath -ll


/etc/multipath.conf - set userfriendly names for devices

  ## Use user friendly names, instead of using WWIDs as names.
  defaults {
         user_friendly_names yes
  #       multipath_tool  "/sbin/multipath -v0"
  #       udev_dir        /dev
  #      polling_interval 10
  #       default_selector        "round-robin 0"
  #       default_path_grouping_policy    failover
  #       default_getuid_callout  "/sbin/scsi_id -g -u -s /block/%n" 
  #        default_prio_callout    "/bin/true"
  #       default_features        "0"
  #       rr_min_io               100
         failback                immediate
  }
  devices {
    device {
        vendor "DGC "
        product "LUNZ            "
        path_grouping_policy group_by_priority
        getuid_callout "/sbin/scsi_id -g -u -s /block/%n"
        prio_callout    "/sbin/mpath_prio_emc /dev/%n"
        path_checker    emc_clariion
        path_selector   "round-robin 0"
        features        "0"
        #features        "1 queue_if_no_path"
        hardware_handler "1 emc"
    }
  }
  # die einzelnen LUNs mit sprechenden Namen
  multipaths {
        multipath {
                wwid    360060160113127004648e477123145678
                alias   meineLUN1
        }
  } 
  # hier alle devices listen die nicht ueber multipathing genutzt werden sollen
  devnode_blacklist {
        wwid 3600508e0000000003ce93cc6b29deb04
        devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st|sda)[0-9]*"
        devnode "^hd[a-z][0-9]*"
  }
  # Sicherstellen, dass die Clariion nicht dabei ist
  blacklist_exceptions {
        device {
                vendor  "DGC "
                product "LUNZ            "
        }
  }

  * Befehle zum überprüfen der korrekten Einstellungen:

Sicherstellen, dass die devices richtig erkannt werden.


==== Rescan SCSI Bus ====

myserver:/ # rescan_scsi_bus
...
...
Scanning for device 9 0 1 0 ...
OLD: Host: scsi9 Channel: 00 Id: 01 Lun: 00
      Vendor: DGC      Model: LUNZ             Rev: 0429
      Type:   Direct-Access                    ANSI SCSI revision: 04
Scanning for device 9 0 1 1 ...
OLD: Host: scsi9 Channel: 00 Id: 01 Lun: 01
      Vendor: DGC      Model: RAID 5           Rev: 0429
      Type:   Direct-Access                    ANSI SCSI revision: 04
Scanning for device 9 0 1 2 ...
NEW: Host: scsi9 Channel: 00 Id: 01 Lun: 02
      Vendor: DGC      Model: RAID 5           Rev: 0429
      Type:   Direct-Access                    ANSI SCSI revision: 04
4 new device(s) found.
0 device(s) removed.

  echo "- - -" > /sys/class/scsi_host/host13/scan
  echo "- - -" > /sys/class/scsi_host/host14/scan

  echo 1 >/sys/class/fc_host/host13/issue_lip
  echo 1 >/sys/class/fc_host/host14/issue_lip
  
  
===== systool =====

   systool -c fc_host
   systool -c fc_remote_ports -v | grep Blocked | wc -l
   systool -c fc_remote_ports -v | grep "Not Present" | wc -l




==== Configuring Path Failover Policies ====


==== FC-Adapter Details ====

  tuxbox:/sys/class/fc_host/host10 # ll
  total 0
  -r--r--r-- 1 root root 4096 Aug 27 08:59 active_fc4s
  lrwxrwxrwx 1 root root    0 Aug 27 08:59 device -> ../../../devices/pci0000:00/0000:00:0b.0/0000:08:00.0/host1
  -r--r--r-- 1 root root 4096 Aug 27 08:59 fabric_name
  --w------- 1 root root 4096 Aug 27 08:59 issue_lip
  -r--r--r-- 1 root root 4096 Aug 27 08:59 maxframe_size
  -r--r--r-- 1 root root 4096 Aug 27 08:59 node_name
  -r--r--r-- 1 root root 4096 Aug 27 08:59 port_id
  -r--r--r-- 1 root root 4096 Aug 27 08:59 port_name
  -r--r--r-- 1 root root 4096 Aug 27 08:59 port_state
  -r--r--r-- 1 root root 4096 Aug 27 08:59 port_type
  -r--r--r-- 1 root root 4096 Aug 27 08:59 speed
  drwxr-xr-x 2 root root    0 Aug 27 09:00 statistics
  -r--r--r-- 1 root root 4096 Aug 27 08:59 supported_classes
  -r--r--r-- 1 root root 4096 Aug 27 08:59 supported_fc4s
  -r--r--r-- 1 root root 4096 Aug 27 08:59 supported_speeds
  -rw-r--r-- 1 root root 4096 Aug 27 08:59 tgtid_bind_type
  --w------- 1 root root 4096 Aug 27 08:59 uevent


systool -av -c fc_host


=== Install Server ALSWAYS without SAN connectet ===

Otherwise local HDD might be recognized after SAN Storage, resulting in local disk NOT beeing /dev/sda
How to correct this:

in /etc/sysconfig/kernel
  INITRD_MODULES="...."

make shure that the HBA module is loaded after ahci