If you have added new storage to a running VM, you probably wont see it. This is because the SCSI bus to which the storage devices are connected needs to be rescanned to make the new hardware visible.How you rescan the SCSI bus depends on the operating system your Virtual Machine is running.Instructions for common supported operating systems are as follows, these assume you have root or suitable privileges.Linux, when adding a new discFirst find your host bus numbergrep mpt /sys/class/scsi_host/host?/proc_nameWhich should return a line like/sys/class/scsi_host/host0/proc_name:mptspiwhere host0 is the relevant field.use this to rescan the bus with the following commandecho "- - -" > /sys/class/scsi_host/host0/scanIn the above command the the hyphens represent controller,channel,lun, so - indicates all controllers, all channels and all luns should be scanned.Linux, when expanding an existing discAssuming you know the device name of the disc you have expanded (eg /dev/sda) then you can simply issue the following command to force the rereading of the disk geometry. NOte that this is not 100% reliable with LVM on older kernels but should work with current kernelsecho 1 > /sys/class/scsi_device/device/rescanWindows ServerWindows should pickup the change in discs regardless of you adding or expanding discs however if not you can either use the gui or the command line to force this. Note that expanding the boot device will typically always require a reboot, and will require you to boot from an alternative boot device (a boot CD image) to actually expand the windows boot partition. All these method assume you are an administrator on the system.GUI method Server 2003Open Computer Management (Local).In the console tree, click Computer Management (Local), click Storage, and then click Disk Management.Click Action, and then click Rescan Disks.GUI method server 2008Open Server Manager.In the tree pane, double-click the Storage node, and select Disk Management.Right-click Disk Management and select Rescan Disks.Command line methodas an administrator, start a command prompt and typediskpartat the diskpart prompt, typerescan Source: blogs.it.ox.ac.uk INSTALANDO E CONFIGURANDO O VSFTPD CENTOSO VSFTP e um servidor de FTP muito facil de configurar.Comecamos instalando ele.# Na sua Shell rode:yum install vsftpd -y# Depois disto vamos no diretorio dele para modificarmos o arquivo de configuracao.cd /etc/vsftpdmv vsftpd.conf vsftpd.conf.BACKUPvim vsftpd.confanonymous_enable=NOlocal_enable=YESwrite_enable=YESlocal_umask=022dirmessage_enable=YESxferlog_enable=YESconnect_from_port_20=YESxferlog_std_format=YESftpd_banner=Bem-Vindo ao FTP.chroot_list_enable=YESchroot_list_file=/etc/vsftpd/chroot_listlisten=YESpam_service_name=vsftpduserlist_enable=YEStcp_wrappers=YESxferlog_file=/var/log/vsftpd.logpasv_enable=YESpasv_min_port=12000pasv_max_port=12100# Note que no arquivo a cima, temos todos os parametros necessarios para que o VSFTP funcione.# Nao esqueca de modificar as linhas: ftpd_banner=Bem-Vindo ao FTP. chroot_list_file=/etc/vsftpd/chroot_list xferlog_file=/var/log/vsftpd.log conforme sua necessidade.ftpd_banner=Bem-Vindo ao FTP. = Mensagem que sera mostrada ao usuario quando ele se conectar no servidor.chroot_list_file=/etc/vsftpd/chroot_list = Caminho do arquivo que contem os usuarios liberados para acessar o FTPxferlog_file=/var/log/vsftpd.log = Caminho do LOG do VSFTP# Depois das modificacoes, basta Iniciarmos o VSFTP, criar o arquivo chroot_list e incluir o usuario no mesmo e criar o usuario FTP./etc/init.d/vsftpd starttouch /etc/vsftpd/chroot_listadduser testevim /etc/vsftpd/chroot_list ( inclua aqui a linha teste, para informarmos ao VSFTP que o usuario sera o teste )Agora, voce ja tem um servidor FTP rodando.Fonte: psyscrew vmstat (virtual memory statistics) is a valuable monitoring utility, which also provides information about block IO and CPU activity in addition to memory.vmstat Basicsvmstat provides a number of values and will typically be called